1. You have that:
 - The trapezoids are similar.
 - The larger  base of the smaller trapezoid is 18 m and its area is 310 m².
 - The larger base of the larger trapezoid is 32 m.
 2. Then:
 Sides=18/32
 Sides=9/16
 Area=(9/16)²
 Area=81/256
 3. Now, you can find the area of the larger trapezoid, as below:
 81/256=310/x
 81x=(310)(256)
 x=79360/81
 x=980 m²
 Therefore, the answer is: The area of the larger trapezoid is 980 m².