SW, I need help with some math (TFLOPS, Pixels)

I'm just terrible with math. :(

Looking for a rough estimate on how much FLOPS might be needed for a theoretical 720p console.

First, let's assume the following:

PS4 = 1080p console = 2,073,600 = 1.84 TFLOPs

XB1 = 900p console = 1,440,000 pixels = 1.31 TFLOPs

??? = 720p console = 921,600 = ?.?? TFLOPs

Thanks in advance.