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Finding the Fourth Proportional to 38.21, 57.03 and 33.66

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Solution

The fourth proportional to 38.21, 57.03 and 33.66 is: 50.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.21 : 57.03 = 33.66 : x
  2. Step 2: Convert to fraction form
    38.21/57.03 = 33.66/x
  3. Step 3: Cross multiply
    38.21x = 57.03 × 33.66
  4. Step 4: Simplify right side
    38.21x = 1,919.69
  5. Step 5: Solve for x
    x = 1,919.69/38.21
  6. Step 6: Final answer
    x = 50.25

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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.