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Finding the Fourth Proportional to 190.92, 262.98 and 163.20

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Solution

The fourth proportional to 190.92, 262.98 and 163.20 is: 224.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.92 : 262.98 = 163.20 : x
  2. Step 2: Convert to fraction form
    190.92/262.98 = 163.20/x
  3. Step 3: Cross multiply
    190.92x = 262.98 × 163.20
  4. Step 4: Simplify right side
    190.92x = 42,918.34
  5. Step 5: Solve for x
    x = 42,918.34/190.92
  6. Step 6: Final answer
    x = 224.80

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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.