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Finding the Fourth Proportional to 38.21, 57.40 and 22.19

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Solution

The fourth proportional to 38.21, 57.40 and 22.19 is: 33.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.21 : 57.40 = 22.19 : x
  2. Step 2: Convert to fraction form
    38.21/57.40 = 22.19/x
  3. Step 3: Cross multiply
    38.21x = 57.40 × 22.19
  4. Step 4: Simplify right side
    38.21x = 1,273.71
  5. Step 5: Solve for x
    x = 1,273.71/38.21
  6. Step 6: Final answer
    x = 33.33

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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.