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Finding the Fourth Proportional to 330.25, 495.22 and 121.96

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Solution

The fourth proportional to 330.25, 495.22 and 121.96 is: 182.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.25 : 495.22 = 121.96 : x
  2. Step 2: Convert to fraction form
    330.25/495.22 = 121.96/x
  3. Step 3: Cross multiply
    330.25x = 495.22 × 121.96
  4. Step 4: Simplify right side
    330.25x = 60,397.03
  5. Step 5: Solve for x
    x = 60,397.03/330.25
  6. Step 6: Final answer
    x = 182.88

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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.