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Finding the Fourth Proportional to 379.14, 523.05 and 239.15

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Solution

The fourth proportional to 379.14, 523.05 and 239.15 is: 329.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.14 : 523.05 = 239.15 : x
  2. Step 2: Convert to fraction form
    379.14/523.05 = 239.15/x
  3. Step 3: Cross multiply
    379.14x = 523.05 × 239.15
  4. Step 4: Simplify right side
    379.14x = 125,087.41
  5. Step 5: Solve for x
    x = 125,087.41/379.14
  6. Step 6: Final answer
    x = 329.92

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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.