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Finding the Fourth Proportional to 190.38, 262.78 and 120.44

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Solution

The fourth proportional to 190.38, 262.78 and 120.44 is: 166.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.38 : 262.78 = 120.44 : x
  2. Step 2: Convert to fraction form
    190.38/262.78 = 120.44/x
  3. Step 3: Cross multiply
    190.38x = 262.78 × 120.44
  4. Step 4: Simplify right side
    190.38x = 31,649.22
  5. Step 5: Solve for x
    x = 31,649.22/190.38
  6. Step 6: Final answer
    x = 166.24

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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.