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Finding the Fourth Proportional to 437,640.11, 656,460.17 and 138,330.91

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Solution

The fourth proportional to 437,640.11, 656,460.17 and 138,330.91 is: 207,496.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,640.11 : 656,460.17 = 138,330.91 : x
  2. Step 2: Convert to fraction form
    437,640.11/656,460.17 = 138,330.91/x
  3. Step 3: Cross multiply
    437,640.11x = 656,460.17 × 138,330.91
  4. Step 4: Simplify right side
    437,640.11x = 90,808,730,038.98
  5. Step 5: Solve for x
    x = 90,808,730,038.98/437,640.11
  6. Step 6: Final answer
    x = 207,496.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.