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Finding the Fourth Proportional to 251.38, 347.26 and 239.23

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Solution

The fourth proportional to 251.38, 347.26 and 239.23 is: 330.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.38 : 347.26 = 239.23 : x
  2. Step 2: Convert to fraction form
    251.38/347.26 = 239.23/x
  3. Step 3: Cross multiply
    251.38x = 347.26 × 239.23
  4. Step 4: Simplify right side
    251.38x = 83,073.81
  5. Step 5: Solve for x
    x = 83,073.81/251.38
  6. Step 6: Final answer
    x = 330.47

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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.