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Finding the Fourth Proportional to 199.20, 298.32 and 166.80

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Solution

The fourth proportional to 199.20, 298.32 and 166.80 is: 249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.20 : 298.32 = 166.80 : x
  2. Step 2: Convert to fraction form
    199.20/298.32 = 166.80/x
  3. Step 3: Cross multiply
    199.20x = 298.32 × 166.80
  4. Step 4: Simplify right side
    199.20x = 49,759.78
  5. Step 5: Solve for x
    x = 49,759.78/199.20
  6. Step 6: Final answer
    x = 249.80

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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.