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Finding the Third Proportional to 190 and 271.25

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Solution

The third proportional to 190 and 271.25 is: 387.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    190 : 271.25 = 271.25 : x
  2. Step 2: Convert to fraction form
    190/271.25 = 271.25/x
  3. Step 3: Cross multiply
    190x = 271.25 × 271.25
  4. Step 4: Simplify right side
    190x = 73,576.56
  5. Step 5: Solve for x
    x = 73,576.56/190
  6. Step 6: Final answer
    x = 387.25

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.