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Finding the Fourth Proportional to 330.91, 496.36 and 87.43

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Solution

The fourth proportional to 330.91, 496.36 and 87.43 is: 131.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.91 : 496.36 = 87.43 : x
  2. Step 2: Convert to fraction form
    330.91/496.36 = 87.43/x
  3. Step 3: Cross multiply
    330.91x = 496.36 × 87.43
  4. Step 4: Simplify right side
    330.91x = 43,396.75
  5. Step 5: Solve for x
    x = 43,396.75/330.91
  6. Step 6: Final answer
    x = 131.14

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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.