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Finding the Fourth Proportional to 269.69, 372.15 and 159.17

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Solution

The fourth proportional to 269.69, 372.15 and 159.17 is: 219.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.69 : 372.15 = 159.17 : x
  2. Step 2: Convert to fraction form
    269.69/372.15 = 159.17/x
  3. Step 3: Cross multiply
    269.69x = 372.15 × 159.17
  4. Step 4: Simplify right side
    269.69x = 59,235.12
  5. Step 5: Solve for x
    x = 59,235.12/269.69
  6. Step 6: Final answer
    x = 219.64

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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.