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Finding the Fourth Proportional to 269.39, 372.09 and 238.40

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Solution

The fourth proportional to 269.39, 372.09 and 238.40 is: 329.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.39 : 372.09 = 238.40 : x
  2. Step 2: Convert to fraction form
    269.39/372.09 = 238.40/x
  3. Step 3: Cross multiply
    269.39x = 372.09 × 238.40
  4. Step 4: Simplify right side
    269.39x = 88,706.26
  5. Step 5: Solve for x
    x = 88,706.26/269.39
  6. Step 6: Final answer
    x = 329.29

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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.