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Finding the Fourth Proportional to 391,826.80, 587,221.80 and 347,244.40

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Solution

The fourth proportional to 391,826.80, 587,221.80 and 347,244.40 is: 520,407.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,826.80 : 587,221.80 = 347,244.40 : x
  2. Step 2: Convert to fraction form
    391,826.80/587,221.80 = 347,244.40/x
  3. Step 3: Cross multiply
    391,826.80x = 587,221.80 × 347,244.40
  4. Step 4: Simplify right side
    391,826.80x = 203,909,481,607.92
  5. Step 5: Solve for x
    x = 203,909,481,607.92/391,826.80
  6. Step 6: Final answer
    x = 520,407.18

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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.