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Finding the Fourth Proportional to 327.30, 490.86 and 129.62

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Solution

The fourth proportional to 327.30, 490.86 and 129.62 is: 194.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.30 : 490.86 = 129.62 : x
  2. Step 2: Convert to fraction form
    327.30/490.86 = 129.62/x
  3. Step 3: Cross multiply
    327.30x = 490.86 × 129.62
  4. Step 4: Simplify right side
    327.30x = 63,625.27
  5. Step 5: Solve for x
    x = 63,625.27/327.30
  6. Step 6: Final answer
    x = 194.39

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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.