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Finding the Fourth Proportional to 330.39, 495.41 and 147.96

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Solution

The fourth proportional to 330.39, 495.41 and 147.96 is: 221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.39 : 495.41 = 147.96 : x
  2. Step 2: Convert to fraction form
    330.39/495.41 = 147.96/x
  3. Step 3: Cross multiply
    330.39x = 495.41 × 147.96
  4. Step 4: Simplify right side
    330.39x = 73,300.12
  5. Step 5: Solve for x
    x = 73,300.12/330.39
  6. Step 6: Final answer
    x = 221.86

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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.