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Finding the Fourth Proportional to 437,900.67, 656,847.05 and 138,381.30

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Solution

The fourth proportional to 437,900.67, 656,847.05 and 138,381.30 is: 207,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,900.67 : 656,847.05 = 138,381.30 : x
  2. Step 2: Convert to fraction form
    437,900.67/656,847.05 = 138,381.30/x
  3. Step 3: Cross multiply
    437,900.67x = 656,847.05 × 138,381.30
  4. Step 4: Simplify right side
    437,900.67x = 90,895,347,988.26
  5. Step 5: Solve for x
    x = 90,895,347,988.26/437,900.67
  6. Step 6: Final answer
    x = 207,570.70

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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.