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Finding the Fourth Proportional to 199.38, 298.86 and 83.74

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Solution

The fourth proportional to 199.38, 298.86 and 83.74 is: 125.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    199.38 : 298.86 = 83.74 : x
  2. Step 2: Convert to fraction form
    199.38/298.86 = 83.74/x
  3. Step 3: Cross multiply
    199.38x = 298.86 × 83.74
  4. Step 4: Simplify right side
    199.38x = 25,026.54
  5. Step 5: Solve for x
    x = 25,026.54/199.38
  6. Step 6: Final answer
    x = 125.52

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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.