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Finding the Fourth Proportional to 197.72, 272.80 and 119.03

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Solution

The fourth proportional to 197.72, 272.80 and 119.03 is: 164.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.72 : 272.80 = 119.03 : x
  2. Step 2: Convert to fraction form
    197.72/272.80 = 119.03/x
  3. Step 3: Cross multiply
    197.72x = 272.80 × 119.03
  4. Step 4: Simplify right side
    197.72x = 32,469.42
  5. Step 5: Solve for x
    x = 32,469.42/197.72
  6. Step 6: Final answer
    x = 164.22

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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.