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Finding the Fourth Proportional to 191.14, 286.29 and 108.69

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Solution

The fourth proportional to 191.14, 286.29 and 108.69 is: 162.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.14 : 286.29 = 108.69 : x
  2. Step 2: Convert to fraction form
    191.14/286.29 = 108.69/x
  3. Step 3: Cross multiply
    191.14x = 286.29 × 108.69
  4. Step 4: Simplify right side
    191.14x = 31,115.79
  5. Step 5: Solve for x
    x = 31,115.79/191.14
  6. Step 6: Final answer
    x = 162.79

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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.