l = 4/3w, based on the first sentence. We know that A = w*l, or Area = width times length, for a rectangle A = 432 432 = w * l 432 = w * (4/3w) 432 = (4/3)(w²) Multiply both sides by (3/4), or 1.25 540 = w² Take the square root of both sides w = 23.23