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Finding the Fourth Proportional to 391,419.32, 587,129.04 and 110,936.60

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Solution

The fourth proportional to 391,419.32, 587,129.04 and 110,936.60 is: 166,404.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,419.32 : 587,129.04 = 110,936.60 : x
  2. Step 2: Convert to fraction form
    391,419.32/587,129.04 = 110,936.60/x
  3. Step 3: Cross multiply
    391,419.32x = 587,129.04 × 110,936.60
  4. Step 4: Simplify right side
    391,419.32x = 65,134,099,458.86
  5. Step 5: Solve for x
    x = 65,134,099,458.86/391,419.32
  6. Step 6: Final answer
    x = 166,404.92

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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.