The crossword solution for the term PRO ___ (PROPORTIONATELY) is RATA. Rata is a Latin word meaning 'in proportion' or 'in due measure'. It is often used in mathematics and science to describe the relationship between two or more variables that are related in a specific way. In other words, it is used to describe how one variable changes in relation to another. For example, if one variable increases, the other variable will increase proportionately.