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Finding the Fourth Proportional to 197.84, 272.87 and 131.31

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Solution

The fourth proportional to 197.84, 272.87 and 131.31 is: 181.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    197.84 : 272.87 = 131.31 : x
  2. Step 2: Convert to fraction form
    197.84/272.87 = 131.31/x
  3. Step 3: Cross multiply
    197.84x = 272.87 × 131.31
  4. Step 4: Simplify right side
    197.84x = 35,829.90
  5. Step 5: Solve for x
    x = 35,829.90/197.84
  6. Step 6: Final answer
    x = 181.11

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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.