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Finding the Third Proportional to 190.50 and 275.63

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Solution

The third proportional to 190.50 and 275.63 is: 398.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    190.50 : 275.63 = 275.63 : x
  2. Step 2: Convert to fraction form
    190.50/275.63 = 275.63/x
  3. Step 3: Cross multiply
    190.50x = 275.63 × 275.63
  4. Step 4: Simplify right side
    190.50x = 75,969.14
  5. Step 5: Solve for x
    x = 75,969.14/190.50
  6. Step 6: Final answer
    x = 398.79

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.