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Finding the Fourth Proportional to 488,909.80, 732,489.90 and 399,680.20

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Solution

The fourth proportional to 488,909.80, 732,489.90 and 399,680.20 is: 598,805.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,909.80 : 732,489.90 = 399,680.20 : x
  2. Step 2: Convert to fraction form
    488,909.80/732,489.90 = 399,680.20/x
  3. Step 3: Cross multiply
    488,909.80x = 732,489.90 × 399,680.20
  4. Step 4: Simplify right side
    488,909.80x = 292,761,709,729.98
  5. Step 5: Solve for x
    x = 292,761,709,729.98/488,909.80
  6. Step 6: Final answer
    x = 598,805.16

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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.