They both come in sets of three.
Macbeth misinterprets the prophecies in Act IV because his ambition and desire for power cloud his judgment. The witches' prophecies play into his deepest desires, leading him to believe that he is invincible and untouchable. As a result, he becomes reckless and ignores the warnings implicit in the prophecies.
In Act III of "Macbeth," it is the second witch who speaks first to the first witch, saying "Sister, where thou?" The witches are preparing to meet Macbeth and share prophecies with him.
Macbeth meets with the three witches on the heath in the beginning of Act IV. They provide him with prophecies, including warnings about Macduff and Birnam Wood.
Act I Scene III is when Macbeth first meets the witches. HOWEVER this could be different for different copies of the play as they are all different.
The Acts don't have names, only numbers. Possibly the names you are thinking of are the names of the five parts of Freytag's Pyramid, a kind of analytical device for looking at the structure of a play. But Freytag's Pyramid (theorectically) applies to all plays, not just to Macbeth.
Macbeth received some of the prophecies from the witches because they planted ideas in his mind drive him towards certain actions. Macbeth's ambition and willingness to act on these prophecies led him to commit murder and deceit in order to fulfill the witches' promises. Ultimately, Macbeth's actions resulted in his downfall.
Macbeth and Lady Macbeth carried out the murder of King Duncan in their quest for power and control over the kingdom. They plotted and executed the deed to fulfill the witches' prophecies and seize the throne for themselves. This act sets in motion a series of tragic events that ultimately lead to their downfall.
In Act 1 of Macbeth, the four stages of temptation are initiation (the witches' prophecies), contemplation (Macbeth considering murder), preparation (Lady Macbeth's plan), and execution (Macbeth committing regicide). These stages highlight the gradual descent into darkness and moral corruption that ultimately leads to the tragic events in the play.
While the witches' prophecies may influence Macbeth's decisions, ultimately it is Macbeth himself who chooses to act on those prophecies. His ambition and willingness to pursue power lead him to take actions that shape his future.
In scene 3 of act 1 in Macbeth, the external conflict arises between Banquo and Macbeth when they encounter the three witches. The witches make prophecies that spark jealousy and ambition in Macbeth, leading to a power struggle between the two friends as Macbeth becomes consumed by thoughts of becoming king.
Banquo is referring to the three witches who have just delivered prophecies to Macbeth and himself in Act 1, Scene 3 of William Shakespeare's play "Macbeth." He calls them "weird women" because their appearance and actions are strange and mysterious.
The witches never said "Macbeth, Macbeth, Macbeth". In Act 4, Scene 1, both the First Apparition and the Second Apparition begin their prophecies by calling out, "Macbeth! Macbeth! Macbeth!" Macbeth responds to the First Apparition by thanking it for warning him against the Thane of Fife (Macduff). Macbeth responds to the Second Apparition with: "Had I three ears, I'd hear thee."