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Finding the Fourth Proportional to 414.57, 572.08 and 239.91

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Solution

The fourth proportional to 414.57, 572.08 and 239.91 is: 331.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.57 : 572.08 = 239.91 : x
  2. Step 2: Convert to fraction form
    414.57/572.08 = 239.91/x
  3. Step 3: Cross multiply
    414.57x = 572.08 × 239.91
  4. Step 4: Simplify right side
    414.57x = 137,247.71
  5. Step 5: Solve for x
    x = 137,247.71/414.57
  6. Step 6: Final answer
    x = 331.06

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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.