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Finding the Fourth Proportional to 269.16, 371.28 and 158.55

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Solution

The fourth proportional to 269.16, 371.28 and 158.55 is: 218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.16 : 371.28 = 158.55 : x
  2. Step 2: Convert to fraction form
    269.16/371.28 = 158.55/x
  3. Step 3: Cross multiply
    269.16x = 371.28 × 158.55
  4. Step 4: Simplify right side
    269.16x = 58,866.44
  5. Step 5: Solve for x
    x = 58,866.44/269.16
  6. Step 6: Final answer
    x = 218.70

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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.