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Finding the Fourth Proportional to 481.12, 721.40 and 327.28

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Solution

The fourth proportional to 481.12, 721.40 and 327.28 is: 490.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.12 : 721.40 = 327.28 : x
  2. Step 2: Convert to fraction form
    481.12/721.40 = 327.28/x
  3. Step 3: Cross multiply
    481.12x = 721.40 × 327.28
  4. Step 4: Simplify right side
    481.12x = 236,099.79
  5. Step 5: Solve for x
    x = 236,099.79/481.12
  6. Step 6: Final answer
    x = 490.73

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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.