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Finding the Fourth Proportional to 327.32, 491.90 and 319.11

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Solution

The fourth proportional to 327.32, 491.90 and 319.11 is: 479.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.32 : 491.90 = 319.11 : x
  2. Step 2: Convert to fraction form
    327.32/491.90 = 319.11/x
  3. Step 3: Cross multiply
    327.32x = 491.90 × 319.11
  4. Step 4: Simplify right side
    327.32x = 156,968.61
  5. Step 5: Solve for x
    x = 156,968.61/327.32
  6. Step 6: Final answer
    x = 479.56

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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.