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Finding the Fourth Proportional to 28.71, 42.89 and 27.41

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Solution

The fourth proportional to 28.71, 42.89 and 27.41 is: 40.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.71 : 42.89 = 27.41 : x
  2. Step 2: Convert to fraction form
    28.71/42.89 = 27.41/x
  3. Step 3: Cross multiply
    28.71x = 42.89 × 27.41
  4. Step 4: Simplify right side
    28.71x = 1,175.26
  5. Step 5: Solve for x
    x = 1,175.26/28.71
  6. Step 6: Final answer
    x = 40.94

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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.