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Finding the Fourth Proportional to 28.25, 42.13 and 27.29

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Solution

The fourth proportional to 28.25, 42.13 and 27.29 is: 40.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.25 : 42.13 = 27.29 : x
  2. Step 2: Convert to fraction form
    28.25/42.13 = 27.29/x
  3. Step 3: Cross multiply
    28.25x = 42.13 × 27.29
  4. Step 4: Simplify right side
    28.25x = 1,149.73
  5. Step 5: Solve for x
    x = 1,149.73/28.25
  6. Step 6: Final answer
    x = 40.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.