ADV [ADVERB after verb]按比例;成比例 If something is distributed pro rata, it is distributed in proportion to the amount or size of something. 按比例;成比例 [formal]
All part-timers should be paid the same, pro rata, as full-timers doing the same job.
所有兼职者应当像全职人员一样同工同酬。
Pro rata is also an adjective.
They are paid their salaries and are entitled to fringe benefits on a pro-rata basis.