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Finding the Fourth Proportional to 414.20, 571.50 and 239.45

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Solution

The fourth proportional to 414.20, 571.50 and 239.45 is: 330.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    414.20 : 571.50 = 239.45 : x
  2. Step 2: Convert to fraction form
    414.20/571.50 = 239.45/x
  3. Step 3: Cross multiply
    414.20x = 571.50 × 239.45
  4. Step 4: Simplify right side
    414.20x = 136,842.82
  5. Step 5: Solve for x
    x = 136,842.82/414.20
  6. Step 6: Final answer
    x = 330.38

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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.