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Finding the Fourth Proportional to 327.62, 490.95 and 319.52

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Solution

The fourth proportional to 327.62, 490.95 and 319.52 is: 478.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.62 : 490.95 = 319.52 : x
  2. Step 2: Convert to fraction form
    327.62/490.95 = 319.52/x
  3. Step 3: Cross multiply
    327.62x = 490.95 × 319.52
  4. Step 4: Simplify right side
    327.62x = 156,868.34
  5. Step 5: Solve for x
    x = 156,868.34/327.62
  6. Step 6: Final answer
    x = 478.81

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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.