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Finding the Fourth Proportional to 391,581.95, 587,085.64 and 125,189.15

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Solution

The fourth proportional to 391,581.95, 587,085.64 and 125,189.15 is: 187,691.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,581.95 : 587,085.64 = 125,189.15 : x
  2. Step 2: Convert to fraction form
    391,581.95/587,085.64 = 125,189.15/x
  3. Step 3: Cross multiply
    391,581.95x = 587,085.64 × 125,189.15
  4. Step 4: Simplify right side
    391,581.95x = 73,496,749,000.40
  5. Step 5: Solve for x
    x = 73,496,749,000.40/391,581.95
  6. Step 6: Final answer
    x = 187,691.87

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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.