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Finding the Fourth Proportional to 196.48, 271.52 and 161.45

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Solution

The fourth proportional to 196.48, 271.52 and 161.45 is: 223.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    196.48 : 271.52 = 161.45 : x
  2. Step 2: Convert to fraction form
    196.48/271.52 = 161.45/x
  3. Step 3: Cross multiply
    196.48x = 271.52 × 161.45
  4. Step 4: Simplify right side
    196.48x = 43,836.90
  5. Step 5: Solve for x
    x = 43,836.90/196.48
  6. Step 6: Final answer
    x = 223.11

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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.