Find the x and y components and the magnitude and direction of the electric field at x = .200 m, y = -.350 m.

This is what I have so far:

The angle is tan^-1 = .4/.35 = 48.8 degrees

E = (Eleftx + Erightx, Elefty + Erighty)

Erx = 0

Ery = (8.99x10^9)(4x10^-9)/(.35m)^2 = 293.55

Elx = (8.99x10^9)(4x10^-9)/(.4m)^2 = 224.75 x cos 48.8 = 148.04

Ely = Ery x sin 48.8 = 220.87

Since the charges are positive, they'll just add up to equal: (148.04, -514.42) since it's in the -y direction.

It says this answer is incorrect, and I'm not sure what I'm doing wrong. Any kind of help with step-by-step instructions would be really appreciated!