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Finding the Fourth Proportional to 331,691.20, 496,989.60 and 191,204.80

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Solution

The fourth proportional to 331,691.20, 496,989.60 and 191,204.80 is: 286,491.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,691.20 : 496,989.60 = 191,204.80 : x
  2. Step 2: Convert to fraction form
    331,691.20/496,989.60 = 191,204.80/x
  3. Step 3: Cross multiply
    331,691.20x = 496,989.60 × 191,204.80
  4. Step 4: Simplify right side
    331,691.20x = 95,026,797,070.08
  5. Step 5: Solve for x
    x = 95,026,797,070.08/331,691.20
  6. Step 6: Final answer
    x = 286,491.76

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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.