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Finding the Fourth Proportional to 269.50, 371.60 and 198.58

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Solution

The fourth proportional to 269.50, 371.60 and 198.58 is: 273.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.50 : 371.60 = 198.58 : x
  2. Step 2: Convert to fraction form
    269.50/371.60 = 198.58/x
  3. Step 3: Cross multiply
    269.50x = 371.60 × 198.58
  4. Step 4: Simplify right side
    269.50x = 73,792.33
  5. Step 5: Solve for x
    x = 73,792.33/269.50
  6. Step 6: Final answer
    x = 273.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.