English definition of “proportion”
› [C] a part of a total number or amount: Children make up a large proportion of the world's population. The class consists of both men and women in roughly equal proportions.
out of proportion › If something is out of proportion, it is much bigger or smaller than it should be, when compared to other things: The punishment is completely out of proportion to the crime.
in proportion › If something is in proportion, it is the right size or shape when compared to other things.
in proportion to › If something changes in proportion to another thing, it changes to the same degree as that thing: Your tax payment increases in proportion to your salary.