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Finding the Fourth Proportional to 484.80, 721.72 and 481.92

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Solution

The fourth proportional to 484.80, 721.72 and 481.92 is: 717.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.80 : 721.72 = 481.92 : x
  2. Step 2: Convert to fraction form
    484.80/721.72 = 481.92/x
  3. Step 3: Cross multiply
    484.80x = 721.72 × 481.92
  4. Step 4: Simplify right side
    484.80x = 347,810.55
  5. Step 5: Solve for x
    x = 347,810.55/484.80
  6. Step 6: Final answer
    x = 717.43

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.