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Finding the Fourth Proportional to 33.31, 50.17 and 28.81

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Solution

The fourth proportional to 33.31, 50.17 and 28.81 is: 43.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.31 : 50.17 = 28.81 : x
  2. Step 2: Convert to fraction form
    33.31/50.17 = 28.81/x
  3. Step 3: Cross multiply
    33.31x = 50.17 × 28.81
  4. Step 4: Simplify right side
    33.31x = 1,445.40
  5. Step 5: Solve for x
    x = 1,445.40/33.31
  6. Step 6: Final answer
    x = 43.39

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.