elem.5.def.11

The term corresponding magnitudes is used of antecedents in relation to antecedents, and of consequents in relation to consequents.

Ὁμόλογα μεγέθη λέγεται τὰ μὲν ἡγούμενα τοῖς ἡγουμένοις τὰ δὲ ἑπόμενα τοῖς ἑπομένοις.