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Finding the Fourth Proportional to 437,640.50, 656,460.70 and 138,331.24

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Solution

The fourth proportional to 437,640.50, 656,460.70 and 138,331.24 is: 207,496.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,640.50 : 656,460.70 = 138,331.24 : x
  2. Step 2: Convert to fraction form
    437,640.50/656,460.70 = 138,331.24/x
  3. Step 3: Cross multiply
    437,640.50x = 656,460.70 × 138,331.24
  4. Step 4: Simplify right side
    437,640.50x = 90,809,020,655.29
  5. Step 5: Solve for x
    x = 90,809,020,655.29/437,640.50
  6. Step 6: Final answer
    x = 207,496.84

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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.