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Finding the Fourth Proportional to 391,457,484.80, 587,167,564.80 and 132,647,321.60

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Solution

The fourth proportional to 391,457,484.80, 587,167,564.80 and 132,647,321.60 is: 198,964,658.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,457,484.80 : 587,167,564.80 = 132,647,321.60 : x
  2. Step 2: Convert to fraction form
    391,457,484.80/587,167,564.80 = 132,647,321.60/x
  3. Step 3: Cross multiply
    391,457,484.80x = 587,167,564.80 × 132,647,321.60
  4. Step 4: Simplify right side
    391,457,484.80x = 77,886,204,801,114,432
  5. Step 5: Solve for x
    x = 77,886,204,801,114,432/391,457,484.80
  6. Step 6: Final answer
    x = 198,964,658.55

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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.