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Finding the Fourth Proportional to 327.20, 490.49 and 164.69

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Solution

The fourth proportional to 327.20, 490.49 and 164.69 is: 246.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.20 : 490.49 = 164.69 : x
  2. Step 2: Convert to fraction form
    327.20/490.49 = 164.69/x
  3. Step 3: Cross multiply
    327.20x = 490.49 × 164.69
  4. Step 4: Simplify right side
    327.20x = 80,778.80
  5. Step 5: Solve for x
    x = 80,778.80/327.20
  6. Step 6: Final answer
    x = 246.88

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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.