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Finding the Fourth Proportional to 306.97, 423.69 and 196.54

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Solution

The fourth proportional to 306.97, 423.69 and 196.54 is: 271.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    306.97 : 423.69 = 196.54 : x
  2. Step 2: Convert to fraction form
    306.97/423.69 = 196.54/x
  3. Step 3: Cross multiply
    306.97x = 423.69 × 196.54
  4. Step 4: Simplify right side
    306.97x = 83,272.03
  5. Step 5: Solve for x
    x = 83,272.03/306.97
  6. Step 6: Final answer
    x = 271.27

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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.