There is no proper proportions for a general model. Each model types have their own "proper proportions." For example, a car model would have a different proportion than an airplane model.
you can use scale model to measure proportions
It mixes fuel and air in the proper proportions to be burned in an internal combustion engine.
A model that accurately shows the proportions between its parts is known as a scale model. Scale models represent objects in a reduced or enlarged form while maintaining the correct ratios of size and dimensions between their components. This type of model is often used in architecture, engineering, and design to visualize and analyze the relationships and proportions of different elements in a project. Examples include architectural maquettes or miniature replicas of vehicles and buildings.
Globe
G.p.s
Only if the parts simulate the actual proportions of the actual salt crystal.
A square meal is a full and balanced meal that includes items from all of the food groups in the proper proportions.
The proportions of a map, model, or diagram match the proportions of the real object, scale models, maps, and diagrams can accurately communicate scientific knowledge.
The proper answer depends on the proportions of each colour, but I suspect that the answer wanted is white. This is for colours (light), not pigments (paints).
A globe is like the Earth because it is a spherical model that represents the Earth's landmasses and bodies of water in their proper proportions. Globes offer a three-dimensional view of the Earth's surface, similar to how we experience the planet in real life.
2.5l
The idea is that you model a situation with similar triangles and then use proportions to find the missing measurement indirectly.