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Finding the Fourth Proportional to 613.72, 843.44 and 552.20

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Solution

The fourth proportional to 613.72, 843.44 and 552.20 is: 758.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.72 : 843.44 = 552.20 : x
  2. Step 2: Convert to fraction form
    613.72/843.44 = 552.20/x
  3. Step 3: Cross multiply
    613.72x = 843.44 × 552.20
  4. Step 4: Simplify right side
    613.72x = 465,740.59
  5. Step 5: Solve for x
    x = 465,740.59/613.72
  6. Step 6: Final answer
    x = 758.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.