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Finding the Fourth Proportional to 33.76, 50.89 and 31.90

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Solution

The fourth proportional to 33.76, 50.89 and 31.90 is: 48.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.76 : 50.89 = 31.90 : x
  2. Step 2: Convert to fraction form
    33.76/50.89 = 31.90/x
  3. Step 3: Cross multiply
    33.76x = 50.89 × 31.90
  4. Step 4: Simplify right side
    33.76x = 1,623.18
  5. Step 5: Solve for x
    x = 1,623.18/33.76
  6. Step 6: Final answer
    x = 48.08

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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.