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Finding the Fourth Proportional to 938,400.38, 1,294,156.38 and 731,720

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Solution

The fourth proportional to 938,400.38, 1,294,156.38 and 731,720 is: 1,009,121.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    938,400.38 : 1,294,156.38 = 731,720 : x
  2. Step 2: Convert to fraction form
    938,400.38/1,294,156.38 = 731,720/x
  3. Step 3: Cross multiply
    938,400.38x = 1,294,156.38 × 731,720
  4. Step 4: Simplify right side
    938,400.38x = 946,960,106,373.60
  5. Step 5: Solve for x
    x = 946,960,106,373.60/938,400.38
  6. Step 6: Final answer
    x = 1,009,121.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.