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Finding the Fourth Proportional to 191, 286.28 and 82.76

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Solution

The fourth proportional to 191, 286.28 and 82.76 is: 124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    191 : 286.28 = 82.76 : x
  2. Step 2: Convert to fraction form
    191/286.28 = 82.76/x
  3. Step 3: Cross multiply
    191x = 286.28 × 82.76
  4. Step 4: Simplify right side
    191x = 23,692.53
  5. Step 5: Solve for x
    x = 23,692.53/191
  6. Step 6: Final answer
    x = 124.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.