Prospective is an adjective meaning (1) likely to happen, or (2) likely to become. It has no other definitions. Perspective is almost always a noun. It refers to (1) a view, (2) the angle from which something is viewed, and (3) the proper appearance of objects in relation to each other. The words share no definitions.
From a fan’s perspective, it was a great game to watch. [Yahoo! Sports]
The fourth section gives a global and historical perspective, perhaps to counterbalance the previous section. [Metapsychology]
No modern-day Samuel Johnson or Noah Webster ponders each prospective entry there. [New York Times]
Some of the best preparation for the interview occurs when you research the prospective employer. [The Union of Grass Valley]