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Finding the Fourth Proportional to 439,909.62, 659,856.33 and 140,387.82

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Solution

The fourth proportional to 439,909.62, 659,856.33 and 140,387.82 is: 210,579.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,909.62 : 659,856.33 = 140,387.82 : x
  2. Step 2: Convert to fraction form
    439,909.62/659,856.33 = 140,387.82/x
  3. Step 3: Cross multiply
    439,909.62x = 659,856.33 × 140,387.82
  4. Step 4: Simplify right side
    439,909.62x = 92,635,791,681.90
  5. Step 5: Solve for x
    x = 92,635,791,681.90/439,909.62
  6. Step 6: Final answer
    x = 210,579.15

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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.