To find the area of the actual bridge deck, we need to convert the dimensions of the scaled bridge deck from inches to feet, and then scale up by a factor of 60.
48 inches = 4 feet
4 and 2/5 inches = 0.3667 feet (rounded to four decimal places)
Area of the scaled bridge deck = 4 feet x 0.3667 feet = 1.4668 square feet
Scaling up by a factor of 60:
Area of actual bridge deck = 1.4668 square feet x 60^2 = 5,280.48 square feet
Therefore, the area of the actual bridge deck is approximately 5,280 square feet.