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Finding the Fourth Proportional to 331,310.13, 496,965.20 and 81,992.13

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Solution

The fourth proportional to 331,310.13, 496,965.20 and 81,992.13 is: 122,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,310.13 : 496,965.20 = 81,992.13 : x
  2. Step 2: Convert to fraction form
    331,310.13/496,965.20 = 81,992.13/x
  3. Step 3: Cross multiply
    331,310.13x = 496,965.20 × 81,992.13
  4. Step 4: Simplify right side
    331,310.13x = 40,747,234,873.92
  5. Step 5: Solve for x
    x = 40,747,234,873.92/331,310.13
  6. Step 6: Final answer
    x = 122,988.20

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Similar ratio
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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.