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Finding the Fourth Proportional to 574.22, 861.34 and 141.38

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Solution

The fourth proportional to 574.22, 861.34 and 141.38 is: 212.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.22 : 861.34 = 141.38 : x
  2. Step 2: Convert to fraction form
    574.22/861.34 = 141.38/x
  3. Step 3: Cross multiply
    574.22x = 861.34 × 141.38
  4. Step 4: Simplify right side
    574.22x = 121,775.54
  5. Step 5: Solve for x
    x = 121,775.54/574.22
  6. Step 6: Final answer
    x = 212.07

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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.