Finding the Third Proportional to 400.31 and 400.31

Step by Step Solution

1. Step 1: Write the proportion equation
   400.31 : 400.31 = 400.31 : x
2. Step 2: Convert to fraction form
   400.31/400.31 = 400.31/x
3. Step 3: Cross multiply
   400.31x = 400.31 × 400.31
4. Step 4: Simplify right side
   400.31x = 160,250.10
5. Step 5: Solve for x
   x = 160,250.10/400.31
6. Step 6: Final answer
   x = 400.31