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Finding the Fourth Proportional to 191.08, 286.70 and 69.43

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Solution

The fourth proportional to 191.08, 286.70 and 69.43 is: 104.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.08 : 286.70 = 69.43 : x
  2. Step 2: Convert to fraction form
    191.08/286.70 = 69.43/x
  3. Step 3: Cross multiply
    191.08x = 286.70 × 69.43
  4. Step 4: Simplify right side
    191.08x = 19,904.52
  5. Step 5: Solve for x
    x = 19,904.52/191.08
  6. Step 6: Final answer
    x = 104.17

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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.