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Finding the Fourth Proportional to 41.91, 57.81 and 40.29

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Solution

The fourth proportional to 41.91, 57.81 and 40.29 is: 55.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.91 : 57.81 = 40.29 : x
  2. Step 2: Convert to fraction form
    41.91/57.81 = 40.29/x
  3. Step 3: Cross multiply
    41.91x = 57.81 × 40.29
  4. Step 4: Simplify right side
    41.91x = 2,329.16
  5. Step 5: Solve for x
    x = 2,329.16/41.91
  6. Step 6: Final answer
    x = 55.58

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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.