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Finding the Fourth Proportional to 459,761,540.60, 689,978,234.10 and 323,712,644.60

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Solution

The fourth proportional to 459,761,540.60, 689,978,234.10 and 323,712,644.60 is: 485,805,486.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    459,761,540.60 : 689,978,234.10 = 323,712,644.60 : x
  2. Step 2: Convert to fraction form
    459,761,540.60/689,978,234.10 = 323,712,644.60/x
  3. Step 3: Cross multiply
    459,761,540.60x = 689,978,234.10 × 323,712,644.60
  4. Step 4: Simplify right side
    459,761,540.60x = 223,354,678,876,948,928
  5. Step 5: Solve for x
    x = 223,354,678,876,948,928/459,761,540.60
  6. Step 6: Final answer
    x = 485,805,486.44

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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.