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Finding the Fourth Proportional to 488,456.20, 732,684.30 and 399,809.80

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Solution

The fourth proportional to 488,456.20, 732,684.30 and 399,809.80 is: 599,714.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,456.20 : 732,684.30 = 399,809.80 : x
  2. Step 2: Convert to fraction form
    488,456.20/732,684.30 = 399,809.80/x
  3. Step 3: Cross multiply
    488,456.20x = 732,684.30 × 399,809.80
  4. Step 4: Simplify right side
    488,456.20x = 292,934,363,446.14
  5. Step 5: Solve for x
    x = 292,934,363,446.14/488,456.20
  6. Step 6: Final answer
    x = 599,714.70

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Double scale
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Similar ratio
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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.