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Finding the Fourth Proportional to 391,459.15, 587,188.73 and 110,978.83

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Solution

The fourth proportional to 391,459.15, 587,188.73 and 110,978.83 is: 166,468.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,459.15 : 587,188.73 = 110,978.83 : x
  2. Step 2: Convert to fraction form
    391,459.15/587,188.73 = 110,978.83/x
  3. Step 3: Cross multiply
    391,459.15x = 587,188.73 × 110,978.83
  4. Step 4: Simplify right side
    391,459.15x = 65,165,518,244.59
  5. Step 5: Solve for x
    x = 65,165,518,244.59/391,459.15
  6. Step 6: Final answer
    x = 166,468.25

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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.