Finding the Third Proportional to 300.38 and 647.81

Step by Step Solution

1. Step 1: Write the proportion equation
   300.38 : 647.81 = 647.81 : x
2. Step 2: Convert to fraction form
   300.38/647.81 = 647.81/x
3. Step 3: Cross multiply
   300.38x = 647.81 × 647.81
4. Step 4: Simplify right side
   300.38x = 419,661.04
5. Step 5: Solve for x
   x = 419,661.04/300.38
6. Step 6: Final answer
   x = 1,397.12