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Finding the Fourth Proportional to 191.04, 286.17 and 139.82

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Solution

The fourth proportional to 191.04, 286.17 and 139.82 is: 209.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    191.04 : 286.17 = 139.82 : x
  2. Step 2: Convert to fraction form
    191.04/286.17 = 139.82/x
  3. Step 3: Cross multiply
    191.04x = 286.17 × 139.82
  4. Step 4: Simplify right side
    191.04x = 40,010.86
  5. Step 5: Solve for x
    x = 40,010.86/191.04
  6. Step 6: Final answer
    x = 209.44

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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.