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Finding the Fourth Proportional to 190.38, 262.66 and 112.76

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Solution

The fourth proportional to 190.38, 262.66 and 112.76 is: 155.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.38 : 262.66 = 112.76 : x
  2. Step 2: Convert to fraction form
    190.38/262.66 = 112.76/x
  3. Step 3: Cross multiply
    190.38x = 262.66 × 112.76
  4. Step 4: Simplify right side
    190.38x = 29,615.66
  5. Step 5: Solve for x
    x = 29,615.66/190.38
  6. Step 6: Final answer
    x = 155.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.