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Finding the Fourth Proportional to 391,481.20, 587,221.80 and 361,068.40

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Solution

The fourth proportional to 391,481.20, 587,221.80 and 361,068.40 is: 541,602.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,481.20 : 587,221.80 = 361,068.40 : x
  2. Step 2: Convert to fraction form
    391,481.20/587,221.80 = 361,068.40/x
  3. Step 3: Cross multiply
    391,481.20x = 587,221.80 × 361,068.40
  4. Step 4: Simplify right side
    391,481.20x = 212,027,235,771.12
  5. Step 5: Solve for x
    x = 212,027,235,771.12/391,481.20
  6. Step 6: Final answer
    x = 541,602.60

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1.5x scale

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.