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Finding the Fourth Proportional to 220.62, 303.87 and 196.38

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Solution

The fourth proportional to 220.62, 303.87 and 196.38 is: 270.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.62 : 303.87 = 196.38 : x
  2. Step 2: Convert to fraction form
    220.62/303.87 = 196.38/x
  3. Step 3: Cross multiply
    220.62x = 303.87 × 196.38
  4. Step 4: Simplify right side
    220.62x = 59,673.99
  5. Step 5: Solve for x
    x = 59,673.99/220.62
  6. Step 6: Final answer
    x = 270.48

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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.