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Finding the Fourth Proportional to 574.20, 861.32 and 189.44

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Solution

The fourth proportional to 574.20, 861.32 and 189.44 is: 284.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.20 : 861.32 = 189.44 : x
  2. Step 2: Convert to fraction form
    574.20/861.32 = 189.44/x
  3. Step 3: Cross multiply
    574.20x = 861.32 × 189.44
  4. Step 4: Simplify right side
    574.20x = 163,168.46
  5. Step 5: Solve for x
    x = 163,168.46/574.20
  6. Step 6: Final answer
    x = 284.17

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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.