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Finding the Fourth Proportional to 197.30, 272.13 and 153.62

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Solution

The fourth proportional to 197.30, 272.13 and 153.62 is: 211.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.30 : 272.13 = 153.62 : x
  2. Step 2: Convert to fraction form
    197.30/272.13 = 153.62/x
  3. Step 3: Cross multiply
    197.30x = 272.13 × 153.62
  4. Step 4: Simplify right side
    197.30x = 41,804.61
  5. Step 5: Solve for x
    x = 41,804.61/197.30
  6. Step 6: Final answer
    x = 211.88

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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.