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Finding the Fourth Proportional to 439,781.70, 659,672.55 and 140,284.20

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Solution

The fourth proportional to 439,781.70, 659,672.55 and 140,284.20 is: 210,426.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,781.70 : 659,672.55 = 140,284.20 : x
  2. Step 2: Convert to fraction form
    439,781.70/659,672.55 = 140,284.20/x
  3. Step 3: Cross multiply
    439,781.70x = 659,672.55 × 140,284.20
  4. Step 4: Simplify right side
    439,781.70x = 92,541,635,938.71
  5. Step 5: Solve for x
    x = 92,541,635,938.71/439,781.70
  6. Step 6: Final answer
    x = 210,426.30

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1.5x scale

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.