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Finding the Fourth Proportional to 41.78, 57.65 and 26.21

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Solution

The fourth proportional to 41.78, 57.65 and 26.21 is: 36.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.78 : 57.65 = 26.21 : x
  2. Step 2: Convert to fraction form
    41.78/57.65 = 26.21/x
  3. Step 3: Cross multiply
    41.78x = 57.65 × 26.21
  4. Step 4: Simplify right side
    41.78x = 1,511.02
  5. Step 5: Solve for x
    x = 1,511.02/41.78
  6. Step 6: Final answer
    x = 36.16

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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.