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Finding the Fourth Proportional to 414.37, 571.80 and 239.71

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Solution

The fourth proportional to 414.37, 571.80 and 239.71 is: 330.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.37 : 571.80 = 239.71 : x
  2. Step 2: Convert to fraction form
    414.37/571.80 = 239.71/x
  3. Step 3: Cross multiply
    414.37x = 571.80 × 239.71
  4. Step 4: Simplify right side
    414.37x = 137,066.18
  5. Step 5: Solve for x
    x = 137,066.18/414.37
  6. Step 6: Final answer
    x = 330.78

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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.