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Finding the Fourth Proportional to 196.81, 271.33 and 163.49

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Solution

The fourth proportional to 196.81, 271.33 and 163.49 is: 225.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.81 : 271.33 = 163.49 : x
  2. Step 2: Convert to fraction form
    196.81/271.33 = 163.49/x
  3. Step 3: Cross multiply
    196.81x = 271.33 × 163.49
  4. Step 4: Simplify right side
    196.81x = 44,359.74
  5. Step 5: Solve for x
    x = 44,359.74/196.81
  6. Step 6: Final answer
    x = 225.39

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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.