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Finding the Fourth Proportional to 190.40, 262.64 and 120.44

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Solution

The fourth proportional to 190.40, 262.64 and 120.44 is: 166.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.40 : 262.64 = 120.44 : x
  2. Step 2: Convert to fraction form
    190.40/262.64 = 120.44/x
  3. Step 3: Cross multiply
    190.40x = 262.64 × 120.44
  4. Step 4: Simplify right side
    190.40x = 31,632.36
  5. Step 5: Solve for x
    x = 31,632.36/190.40
  6. Step 6: Final answer
    x = 166.14

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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.