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Finding the Fourth Proportional to 331.20, 496.92 and 291.12

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Solution

The fourth proportional to 331.20, 496.92 and 291.12 is: 436.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.20 : 496.92 = 291.12 : x
  2. Step 2: Convert to fraction form
    331.20/496.92 = 291.12/x
  3. Step 3: Cross multiply
    331.20x = 496.92 × 291.12
  4. Step 4: Simplify right side
    331.20x = 144,663.35
  5. Step 5: Solve for x
    x = 144,663.35/331.20
  6. Step 6: Final answer
    x = 436.79

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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.