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Finding the Fourth Proportional to 269.31, 371.64 and 158.85

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Solution

The fourth proportional to 269.31, 371.64 and 158.85 is: 219.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.31 : 371.64 = 158.85 : x
  2. Step 2: Convert to fraction form
    269.31/371.64 = 158.85/x
  3. Step 3: Cross multiply
    269.31x = 371.64 × 158.85
  4. Step 4: Simplify right side
    269.31x = 59,035.01
  5. Step 5: Solve for x
    x = 59,035.01/269.31
  6. Step 6: Final answer
    x = 219.21

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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.