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Finding the Fourth Proportional to 196.39, 294.57 and 80.80

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Solution

The fourth proportional to 196.39, 294.57 and 80.80 is: 121.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.39 : 294.57 = 80.80 : x
  2. Step 2: Convert to fraction form
    196.39/294.57 = 80.80/x
  3. Step 3: Cross multiply
    196.39x = 294.57 × 80.80
  4. Step 4: Simplify right side
    196.39x = 23,800.52
  5. Step 5: Solve for x
    x = 23,800.52/196.39
  6. Step 6: Final answer
    x = 121.19

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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.