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Finding the Fourth Proportional to 330.07, 495.26 and 135.21

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Solution

The fourth proportional to 330.07, 495.26 and 135.21 is: 202.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    330.07 : 495.26 = 135.21 : x
  2. Step 2: Convert to fraction form
    330.07/495.26 = 135.21/x
  3. Step 3: Cross multiply
    330.07x = 495.26 × 135.21
  4. Step 4: Simplify right side
    330.07x = 66,964.67
  5. Step 5: Solve for x
    x = 66,964.67/330.07
  6. Step 6: Final answer
    x = 202.88

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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.