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Finding the Fourth Proportional to 330.50, 495.40 and 238.97

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Solution

The fourth proportional to 330.50, 495.40 and 238.97 is: 358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.50 : 495.40 = 238.97 : x
  2. Step 2: Convert to fraction form
    330.50/495.40 = 238.97/x
  3. Step 3: Cross multiply
    330.50x = 495.40 × 238.97
  4. Step 4: Simplify right side
    330.50x = 118,385.74
  5. Step 5: Solve for x
    x = 118,385.74/330.50
  6. Step 6: Final answer
    x = 358.20

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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.