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Finding the Fourth Proportional to 197.87, 272.89 and 135.59

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Solution

The fourth proportional to 197.87, 272.89 and 135.59 is: 186.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.87 : 272.89 = 135.59 : x
  2. Step 2: Convert to fraction form
    197.87/272.89 = 135.59/x
  3. Step 3: Cross multiply
    197.87x = 272.89 × 135.59
  4. Step 4: Simplify right side
    197.87x = 36,999.45
  5. Step 5: Solve for x
    x = 36,999.45/197.87
  6. Step 6: Final answer
    x = 186.99

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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.