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Finding the Fourth Proportional to 330.36, 495.60 and 99.24

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Solution

The fourth proportional to 330.36, 495.60 and 99.24 is: 148.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.36 : 495.60 = 99.24 : x
  2. Step 2: Convert to fraction form
    330.36/495.60 = 99.24/x
  3. Step 3: Cross multiply
    330.36x = 495.60 × 99.24
  4. Step 4: Simplify right side
    330.36x = 49,183.34
  5. Step 5: Solve for x
    x = 49,183.34/330.36
  6. Step 6: Final answer
    x = 148.88

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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.