PRO RATA Meaning of PRO RATA in English pro rata BrE AmE ( ˌ ) prəʊ ˈrɑːt ə -ˈreɪt- AmE \ ( ˌ ) proʊ ˈreɪt̬ ə -ˈrɑːt̬-, -ˈræt̬- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012