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Finding the Fourth Proportional to 391,054.60, 587,748.30 and 384,056.20

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Solution

The fourth proportional to 391,054.60, 587,748.30 and 384,056.20 is: 577,229.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,054.60 : 587,748.30 = 384,056.20 : x
  2. Step 2: Convert to fraction form
    391,054.60/587,748.30 = 384,056.20/x
  3. Step 3: Cross multiply
    391,054.60x = 587,748.30 × 384,056.20
  4. Step 4: Simplify right side
    391,054.60x = 225,728,378,654.46
  5. Step 5: Solve for x
    x = 225,728,378,654.46/391,054.60
  6. Step 6: Final answer
    x = 577,229.83

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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.