The flop raise was OKAY, if on the shakey side. However, teh turn bet, in my opinion, simply wasn't worth it.

Flop bet was shakey because you said the UTG had very little money left... therefore, if he had anything, including a good ace high, he'd be justified in calling.

Turn bet was REAL shakey because you're betting over 200 to win the 100 in the side pot there. Take the freecard and hope for the best. Since UTG is all in there, there if very little chance UTG will bluff on the river, for the same reasons that you shouldn't bluff on the turn.