Finding the Third Proportional to 233.75 and 390.38

Step by Step Solution

1. Step 1: Write the proportion equation
   233.75 : 390.38 = 390.38 : x
2. Step 2: Convert to fraction form
   233.75/390.38 = 390.38/x
3. Step 3: Cross multiply
   233.75x = 390.38 × 390.38
4. Step 4: Simplify right side
   233.75x = 152,392.64
5. Step 5: Solve for x
   x = 152,392.64/233.75
6. Step 6: Final answer
   x = 651.95