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Finding the Fourth Proportional to 196.62, 294.60 and 138.74

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Solution

The fourth proportional to 196.62, 294.60 and 138.74 is: 207.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.62 : 294.60 = 138.74 : x
  2. Step 2: Convert to fraction form
    196.62/294.60 = 138.74/x
  3. Step 3: Cross multiply
    196.62x = 294.60 × 138.74
  4. Step 4: Simplify right side
    196.62x = 40,871.33
  5. Step 5: Solve for x
    x = 40,871.33/196.62
  6. Step 6: Final answer
    x = 207.87

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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.