geometrical proportion
/ˌdʒiːəˌmɛtrɪkl prəˈpɔːʃn/ /dʒɪəˌmɛtrɪkl prəˈpɔːʃn/Mathematics
noun
A relationship between pairs of quantities in which the ratio between the first pair is the same as that between the second, i.e. a: b:: c: d (‘a is to b as c is to d’); the relationship between the quantities in a geometric progression. Contrasted with arithmetical proportion.
- Now usually called simply proportion..
Origin
Mid 16th century. From geometrical + proportion, after post-classical Latin proportio geometrica, itself after ancient Greek ἀναλογία γεωμετρική.
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