Final answer:
To find the distance from the fence in dead center to third base, subtract the distance from home plate to third base from the distance from home plate to the fence in dead center.
Step-by-step explanation:
To find the distance from the fence in dead center to third base, we need to subtract the distance from home plate to third base from the distance from home plate to the fence in dead center.
Let's assume the distance from home plate to third base is x feet.
Then the distance from the fence in dead center to third base would be 398 - x feet.