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Finding the Fourth Proportional to 190.82, 286.22 and 75.23

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Solution

The fourth proportional to 190.82, 286.22 and 75.23 is: 112.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.82 : 286.22 = 75.23 : x
  2. Step 2: Convert to fraction form
    190.82/286.22 = 75.23/x
  3. Step 3: Cross multiply
    190.82x = 286.22 × 75.23
  4. Step 4: Simplify right side
    190.82x = 21,530.52
  5. Step 5: Solve for x
    x = 21,530.52/190.82
  6. Step 6: Final answer
    x = 112.83

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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.