What does the term "Proportion" mean?

The term "Proportion" specifically refers to the relationship between quantities, indicating how much of one thing there is relative to another. In mathematical terms, it expresses that two ratios are equal. Therefore, "according to amount" captures the essence of how proportions relate different quantities based on their respective values.

For example, if you have a proportion that compares the number of students in two classes, it indicates the relative sizes of those classes in terms of their amounts. This understanding of proportion is fundamental in solving problems related to scaling, comparing quantities, and finding missing values in equations.

The other choices fail to accurately define "proportion." Equal distribution of resources pertains to fairness rather than a mathematical relationship. A synonym for ratio suggests that the terms are interchangeable, which is not entirely correct since while related, they have distinct meanings. A mathematical constant does not align with the definition of proportion, as proportions involve variable quantities rather than a fixed numerical value.