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Finding the Fourth Proportional to 33.20, 49.78 and 15.14

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Solution

The fourth proportional to 33.20, 49.78 and 15.14 is: 22.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.20 : 49.78 = 15.14 : x
  2. Step 2: Convert to fraction form
    33.20/49.78 = 15.14/x
  3. Step 3: Cross multiply
    33.20x = 49.78 × 15.14
  4. Step 4: Simplify right side
    33.20x = 753.67
  5. Step 5: Solve for x
    x = 753.67/33.20
  6. Step 6: Final answer
    x = 22.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.