P / prōportĭōnālis
adjective

prōportĭōnālis

neut. prōportĭōnāle
belonging to proportion; proportional; proportionally
of or belonging to proportion, proportional (post-class.): termini, Front. Colon. p. 111. —Hence, prōportĭōnālĭter, adv., proportionally, Cassiod. Geom. 6.