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Finding the Fourth Proportional to 330.16, 495.09 and 147.42

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Solution

The fourth proportional to 330.16, 495.09 and 147.42 is: 221.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.16 : 495.09 = 147.42 : x
  2. Step 2: Convert to fraction form
    330.16/495.09 = 147.42/x
  3. Step 3: Cross multiply
    330.16x = 495.09 × 147.42
  4. Step 4: Simplify right side
    330.16x = 72,988.02
  5. Step 5: Solve for x
    x = 72,988.02/330.16
  6. Step 6: Final answer
    x = 221.07

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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.