If you would like to know what are the dimensions of the quilt, you can calculate this using the following steps:
the area ... 4,800 square inches
the length ... 1 1/3 * x = 4/3 * x
the width ... x
4,800 = 1 1/3 * x * x
4,800 = 4/3 * x^2 /*3/4
x^2 = 4,800 * 3/4
x^2 = 3,600
x = 60 inches
1 1/3 * x = 4/3 * 60 inches = 80 inches
Result: The length of the quilt is 80 inches and the width of the quilt is 60 inches.