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Finding the Fourth Proportional to 871.61, 1,203.13 and 576.97

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Solution

The fourth proportional to 871.61, 1,203.13 and 576.97 is: 796.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.61 : 1,203.13 = 576.97 : x
  2. Step 2: Convert to fraction form
    871.61/1,203.13 = 576.97/x
  3. Step 3: Cross multiply
    871.61x = 1,203.13 × 576.97
  4. Step 4: Simplify right side
    871.61x = 694,165.47
  5. Step 5: Solve for x
    x = 694,165.47/871.61
  6. Step 6: Final answer
    x = 796.42

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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.