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Finding the Fourth Proportional to 574.89, 862.40 and 209.71

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Solution

The fourth proportional to 574.89, 862.40 and 209.71 is: 314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.89 : 862.40 = 209.71 : x
  2. Step 2: Convert to fraction form
    574.89/862.40 = 209.71/x
  3. Step 3: Cross multiply
    574.89x = 862.40 × 209.71
  4. Step 4: Simplify right side
    574.89x = 180,853.90
  5. Step 5: Solve for x
    x = 180,853.90/574.89
  6. Step 6: Final answer
    x = 314.59

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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.