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Finding the Fourth Proportional to 33.68, 50.26 and 31.91

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Solution

The fourth proportional to 33.68, 50.26 and 31.91 is: 47.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.68 : 50.26 = 31.91 : x
  2. Step 2: Convert to fraction form
    33.68/50.26 = 31.91/x
  3. Step 3: Cross multiply
    33.68x = 50.26 × 31.91
  4. Step 4: Simplify right side
    33.68x = 1,603.80
  5. Step 5: Solve for x
    x = 1,603.80/33.68
  6. Step 6: Final answer
    x = 47.62

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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.