Книга: Proportionality Mathematics: Proportionality Mathematics, Mathematics, Quantity, Mathematical Constant, Multiple, Ratio, Proportionality, Correlation and Dependence, Eudoxus of Cnidus

High Quality Content by WIKIPEDIA articles! This article is about proportionality, the mathematical relation. For other uses of the term proportionality, see Proportionality disambiguation. y is directly proportional to x. In mathematics, two quantities are said to be proportional if they vary in such a way that one of the quantities is a constant multiple of the other, or equivalently if they have a constant ratio. Proportion also refers to the equality of two ratios.