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Finding the Fourth Proportional to 391,177.20, 587,154.60 and 191,722.80

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Solution

The fourth proportional to 391,177.20, 587,154.60 and 191,722.80 is: 287,774.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,177.20 : 587,154.60 = 191,722.80 : x
  2. Step 2: Convert to fraction form
    391,177.20/587,154.60 = 191,722.80/x
  3. Step 3: Cross multiply
    391,177.20x = 587,154.60 × 191,722.80
  4. Step 4: Simplify right side
    391,177.20x = 112,570,923,944.88
  5. Step 5: Solve for x
    x = 112,570,923,944.88/391,177.20
  6. Step 6: Final answer
    x = 287,774.76

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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.