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Finding the Fourth Proportional to 41.56, 62.28 and 21.22

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Solution

The fourth proportional to 41.56, 62.28 and 21.22 is: 31.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.56 : 62.28 = 21.22 : x
  2. Step 2: Convert to fraction form
    41.56/62.28 = 21.22/x
  3. Step 3: Cross multiply
    41.56x = 62.28 × 21.22
  4. Step 4: Simplify right side
    41.56x = 1,321.58
  5. Step 5: Solve for x
    x = 1,321.58/41.56
  6. Step 6: Final answer
    x = 31.80

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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.