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Finding the Fourth Proportional to 478,279.82, 717,170.62 and 178,513.88

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Solution

The fourth proportional to 478,279.82, 717,170.62 and 178,513.88 is: 267,677.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,279.82 : 717,170.62 = 178,513.88 : x
  2. Step 2: Convert to fraction form
    478,279.82/717,170.62 = 178,513.88/x
  3. Step 3: Cross multiply
    478,279.82x = 717,170.62 × 178,513.88
  4. Step 4: Simplify right side
    478,279.82x = 128,024,906,412.35
  5. Step 5: Solve for x
    x = 128,024,906,412.35/478,279.82
  6. Step 6: Final answer
    x = 267,677.83

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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.