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Finding the Fourth Proportional to 203.67, 280.26 and 197.61

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Solution

The fourth proportional to 203.67, 280.26 and 197.61 is: 271.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    203.67 : 280.26 = 197.61 : x
  2. Step 2: Convert to fraction form
    203.67/280.26 = 197.61/x
  3. Step 3: Cross multiply
    203.67x = 280.26 × 197.61
  4. Step 4: Simplify right side
    203.67x = 55,382.18
  5. Step 5: Solve for x
    x = 55,382.18/203.67
  6. Step 6: Final answer
    x = 271.92

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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.