Flop nut flush draw

[chadplusplus]

I screwed up the math. His fold percentage does not have to be as high as I originally thought.

He checks to you on the turn and you push him all in:

Risking $93 to win $268.

268 * (25% + x%) - 93 * (75%-x) = 0 (break even)
x < 1%

So essentially, if there is ANY chance that he will fold, it suddenly becomes worth a push on the turn.

Can anyone check my math? I still get these scewed up sometimes, especially after a 13 hour work day.