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Finding the Fourth Proportional to 191.08, 286.56 and 69.32

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Solution

The fourth proportional to 191.08, 286.56 and 69.32 is: 103.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.08 : 286.56 = 69.32 : x
  2. Step 2: Convert to fraction form
    191.08/286.56 = 69.32/x
  3. Step 3: Cross multiply
    191.08x = 286.56 × 69.32
  4. Step 4: Simplify right side
    191.08x = 19,864.34
  5. Step 5: Solve for x
    x = 19,864.34/191.08
  6. Step 6: Final answer
    x = 103.96

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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.