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Finding the Fourth Proportional to 439,909.12, 659,855.58 and 140,387.32

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Solution

The fourth proportional to 439,909.12, 659,855.58 and 140,387.32 is: 210,578.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,909.12 : 659,855.58 = 140,387.32 : x
  2. Step 2: Convert to fraction form
    439,909.12/659,855.58 = 140,387.32/x
  3. Step 3: Cross multiply
    439,909.12x = 659,855.58 × 140,387.32
  4. Step 4: Simplify right side
    439,909.12x = 92,635,356,463.25
  5. Step 5: Solve for x
    x = 92,635,356,463.25/439,909.12
  6. Step 6: Final answer
    x = 210,578.40

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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.