Because the rules say so
In poker, a straight flush, four of a kind, a full house, a flush, a straight, and a two pair can beat a three of a kind.
In poker, a straight, a flush, a full house, four of a kind, a straight flush, and a royal flush beat three of a kind.
Three aces in poker does not beat a small straight. A small straight beats three of a kind and two of a kind.
In poker, a three of a kind can be beaten by a straight, a flush, a full house, four of a kind, a straight flush, or a royal flush.
Four of a kind in poker beats three of a kind. Even four deuces beats three aces.
There is no run of four in poker, you must have five cards to make a hand. A run of four is worth nothing against a three of a kind or any other hand.
In poker, a straight, a flush, a full house, four of a kind, a straight flush, and a royal flush beat three of a kind.
In poker, a straight, a flush, a full house, four of a kind, a straight flush, and a royal flush beat a three of a kind.
In poker, a hand that can beat a pair is a two pair, three of a kind, straight, flush, full house, four of a kind, straight flush, or royal flush.
No, in poker, a straight does not beat three of a kind. Three of a kind is a higher ranking hand than a straight.
In a game of poker, a straight, a flush, a full house, four of a kind, a straight flush, and a royal flush all beat a three of a kind.
No, in poker, four of a kind beats a full house.