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Finding the Fourth Proportional to 330.78, 495.69 and 168.24

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Solution

The fourth proportional to 330.78, 495.69 and 168.24 is: 252.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.78 : 495.69 = 168.24 : x
  2. Step 2: Convert to fraction form
    330.78/495.69 = 168.24/x
  3. Step 3: Cross multiply
    330.78x = 495.69 × 168.24
  4. Step 4: Simplify right side
    330.78x = 83,394.89
  5. Step 5: Solve for x
    x = 83,394.89/330.78
  6. Step 6: Final answer
    x = 252.12

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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.