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Finding the Fourth Proportional to 197.49, 272.34 and 153.75

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Solution

The fourth proportional to 197.49, 272.34 and 153.75 is: 212.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.49 : 272.34 = 153.75 : x
  2. Step 2: Convert to fraction form
    197.49/272.34 = 153.75/x
  3. Step 3: Cross multiply
    197.49x = 272.34 × 153.75
  4. Step 4: Simplify right side
    197.49x = 41,872.28
  5. Step 5: Solve for x
    x = 41,872.28/197.49
  6. Step 6: Final answer
    x = 212.02

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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.