proporcij
Proporcij is a term used in mathematics to describe the relationship between two quantities where their ratio remains constant. This means that as one quantity changes, the other quantity changes by the same factor, maintaining the same relative size. For example, if the ratio of apples to oranges is 2:1, then for every two apples, there will always be one orange. If you double the number of apples to four, you must also double the number of oranges to two to maintain the proporcij.
Mathematically, a proporcij can be expressed as an equation stating that two ratios are equal. For instance,