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Finding the Fourth Proportional to 481.61, 721.20 and 379.46

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Solution

The fourth proportional to 481.61, 721.20 and 379.46 is: 568.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.61 : 721.20 = 379.46 : x
  2. Step 2: Convert to fraction form
    481.61/721.20 = 379.46/x
  3. Step 3: Cross multiply
    481.61x = 721.20 × 379.46
  4. Step 4: Simplify right side
    481.61x = 273,662.95
  5. Step 5: Solve for x
    x = 273,662.95/481.61
  6. Step 6: Final answer
    x = 568.23

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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.