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Finding the Fourth Proportional to 318,244.78, 477,331.53 and 81,593.02

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Solution

The fourth proportional to 318,244.78, 477,331.53 and 81,593.02 is: 122,380.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,244.78 : 477,331.53 = 81,593.02 : x
  2. Step 2: Convert to fraction form
    318,244.78/477,331.53 = 81,593.02/x
  3. Step 3: Cross multiply
    318,244.78x = 477,331.53 × 81,593.02
  4. Step 4: Simplify right side
    318,244.78x = 38,946,921,073.92
  5. Step 5: Solve for x
    x = 38,946,921,073.92/318,244.78
  6. Step 6: Final answer
    x = 122,380.39

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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.