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Finding the Fourth Proportional to 33.70, 50.22 and 31.38

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Solution

The fourth proportional to 33.70, 50.22 and 31.38 is: 46.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.70 : 50.22 = 31.38 : x
  2. Step 2: Convert to fraction form
    33.70/50.22 = 31.38/x
  3. Step 3: Cross multiply
    33.70x = 50.22 × 31.38
  4. Step 4: Simplify right side
    33.70x = 1,575.90
  5. Step 5: Solve for x
    x = 1,575.90/33.70
  6. Step 6: Final answer
    x = 46.76

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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.