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Finding the Fourth Proportional to 204.19, 306.33 and 80.80

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Solution

The fourth proportional to 204.19, 306.33 and 80.80 is: 121.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.19 : 306.33 = 80.80 : x
  2. Step 2: Convert to fraction form
    204.19/306.33 = 80.80/x
  3. Step 3: Cross multiply
    204.19x = 306.33 × 80.80
  4. Step 4: Simplify right side
    204.19x = 24,751.46
  5. Step 5: Solve for x
    x = 24,751.46/204.19
  6. Step 6: Final answer
    x = 121.22

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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.