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Finding the Fourth Proportional to 27.29, 40.87 and 25.31

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Solution

The fourth proportional to 27.29, 40.87 and 25.31 is: 37.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.29 : 40.87 = 25.31 : x
  2. Step 2: Convert to fraction form
    27.29/40.87 = 25.31/x
  3. Step 3: Cross multiply
    27.29x = 40.87 × 25.31
  4. Step 4: Simplify right side
    27.29x = 1,034.42
  5. Step 5: Solve for x
    x = 1,034.42/27.29
  6. Step 6: Final answer
    x = 37.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.