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Finding the Fourth Proportional to 574.28, 861.83 and 209.37

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Solution

The fourth proportional to 574.28, 861.83 and 209.37 is: 314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.28 : 861.83 = 209.37 : x
  2. Step 2: Convert to fraction form
    574.28/861.83 = 209.37/x
  3. Step 3: Cross multiply
    574.28x = 861.83 × 209.37
  4. Step 4: Simplify right side
    574.28x = 180,440.30
  5. Step 5: Solve for x
    x = 180,440.30/574.28
  6. Step 6: Final answer
    x = 314.21

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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.