An example of prorate is a landlord charging a tenant $500 for staying in a house for fifteen days, where the rent is $1,000 per month.
intransitive verb-·rat′ed, -·rat′ing
Origin of proratefrom pro rata
verbpro·rat·ed, pro·rat·ing, pro·rates
Origin of prorateFrom pro rata
(third-person singular simple present prorates, present participle prorating, simple past and past participle prorated)