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Finding the Fourth Proportional to 27.31, 40.75 and 26.89

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Solution

The fourth proportional to 27.31, 40.75 and 26.89 is: 40.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    27.31 : 40.75 = 26.89 : x
  2. Step 2: Convert to fraction form
    27.31/40.75 = 26.89/x
  3. Step 3: Cross multiply
    27.31x = 40.75 × 26.89
  4. Step 4: Simplify right side
    27.31x = 1,095.83
  5. Step 5: Solve for x
    x = 1,095.83/27.31
  6. Step 6: Final answer
    x = 40.13

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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.