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Finding the Fourth Proportional to 197.40, 272.28 and 144.96

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Solution

The fourth proportional to 197.40, 272.28 and 144.96 is: 199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.40 : 272.28 = 144.96 : x
  2. Step 2: Convert to fraction form
    197.40/272.28 = 144.96/x
  3. Step 3: Cross multiply
    197.40x = 272.28 × 144.96
  4. Step 4: Simplify right side
    197.40x = 39,469.71
  5. Step 5: Solve for x
    x = 39,469.71/197.40
  6. Step 6: Final answer
    x = 199.95

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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.