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Finding the Fourth Proportional to 196.34, 271.08 and 154.84

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Solution

The fourth proportional to 196.34, 271.08 and 154.84 is: 213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.34 : 271.08 = 154.84 : x
  2. Step 2: Convert to fraction form
    196.34/271.08 = 154.84/x
  3. Step 3: Cross multiply
    196.34x = 271.08 × 154.84
  4. Step 4: Simplify right side
    196.34x = 41,974.03
  5. Step 5: Solve for x
    x = 41,974.03/196.34
  6. Step 6: Final answer
    x = 213.78

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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.