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Finding the Fourth Proportional to 327.32, 490.35 and 217.31

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Solution

The fourth proportional to 327.32, 490.35 and 217.31 is: 325.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.32 : 490.35 = 217.31 : x
  2. Step 2: Convert to fraction form
    327.32/490.35 = 217.31/x
  3. Step 3: Cross multiply
    327.32x = 490.35 × 217.31
  4. Step 4: Simplify right side
    327.32x = 106,557.75
  5. Step 5: Solve for x
    x = 106,557.75/327.32
  6. Step 6: Final answer
    x = 325.54

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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.