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Finding the Fourth Proportional to 414.38, 571.66 and 239.63

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Solution

The fourth proportional to 414.38, 571.66 and 239.63 is: 330.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.38 : 571.66 = 239.63 : x
  2. Step 2: Convert to fraction form
    414.38/571.66 = 239.63/x
  3. Step 3: Cross multiply
    414.38x = 571.66 × 239.63
  4. Step 4: Simplify right side
    414.38x = 136,983.43
  5. Step 5: Solve for x
    x = 136,983.43/414.38
  6. Step 6: Final answer
    x = 330.57

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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.