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Finding the Fourth Proportional to 613.20, 843.66 and 481.92

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Solution

The fourth proportional to 613.20, 843.66 and 481.92 is: 663.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.20 : 843.66 = 481.92 : x
  2. Step 2: Convert to fraction form
    613.20/843.66 = 481.92/x
  3. Step 3: Cross multiply
    613.20x = 843.66 × 481.92
  4. Step 4: Simplify right side
    613.20x = 406,576.63
  5. Step 5: Solve for x
    x = 406,576.63/613.20
  6. Step 6: Final answer
    x = 663.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.