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Finding the Fourth Proportional to 219.56, 303.08 and 197.68

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Solution

The fourth proportional to 219.56, 303.08 and 197.68 is: 272.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.56 : 303.08 = 197.68 : x
  2. Step 2: Convert to fraction form
    219.56/303.08 = 197.68/x
  3. Step 3: Cross multiply
    219.56x = 303.08 × 197.68
  4. Step 4: Simplify right side
    219.56x = 59,912.85
  5. Step 5: Solve for x
    x = 59,912.85/219.56
  6. Step 6: Final answer
    x = 272.88

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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.