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Finding the Fourth Proportional to 327.15, 490.39 and 132.09

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Solution

The fourth proportional to 327.15, 490.39 and 132.09 is: 198.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.15 : 490.39 = 132.09 : x
  2. Step 2: Convert to fraction form
    327.15/490.39 = 132.09/x
  3. Step 3: Cross multiply
    327.15x = 490.39 × 132.09
  4. Step 4: Simplify right side
    327.15x = 64,775.62
  5. Step 5: Solve for x
    x = 64,775.62/327.15
  6. Step 6: Final answer
    x = 198.00

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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.