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Finding the Fourth Proportional to 197.74, 271.15 and 190.87

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Solution

The fourth proportional to 197.74, 271.15 and 190.87 is: 261.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.74 : 271.15 = 190.87 : x
  2. Step 2: Convert to fraction form
    197.74/271.15 = 190.87/x
  3. Step 3: Cross multiply
    197.74x = 271.15 × 190.87
  4. Step 4: Simplify right side
    197.74x = 51,754.40
  5. Step 5: Solve for x
    x = 51,754.40/197.74
  6. Step 6: Final answer
    x = 261.73

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.