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Finding the Fourth Proportional to 269.67, 372.09 and 159.15

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Solution

The fourth proportional to 269.67, 372.09 and 159.15 is: 219.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.67 : 372.09 = 159.15 : x
  2. Step 2: Convert to fraction form
    269.67/372.09 = 159.15/x
  3. Step 3: Cross multiply
    269.67x = 372.09 × 159.15
  4. Step 4: Simplify right side
    269.67x = 59,218.12
  5. Step 5: Solve for x
    x = 59,218.12/269.67
  6. Step 6: Final answer
    x = 219.59

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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.