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Finding the Fourth Proportional to 197.76, 296.62 and 136.86

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Solution

The fourth proportional to 197.76, 296.62 and 136.86 is: 205.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.76 : 296.62 = 136.86 : x
  2. Step 2: Convert to fraction form
    197.76/296.62 = 136.86/x
  3. Step 3: Cross multiply
    197.76x = 296.62 × 136.86
  4. Step 4: Simplify right side
    197.76x = 40,595.41
  5. Step 5: Solve for x
    x = 40,595.41/197.76
  6. Step 6: Final answer
    x = 205.28

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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.