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Finding the Third Proportional to 189.84 and 274.36

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Solution

The third proportional to 189.84 and 274.36 is: 396.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.84 : 274.36 = 274.36 : x
  2. Step 2: Convert to fraction form
    189.84/274.36 = 274.36/x
  3. Step 3: Cross multiply
    189.84x = 274.36 × 274.36
  4. Step 4: Simplify right side
    189.84x = 75,273.07
  5. Step 5: Solve for x
    x = 75,273.07/189.84
  6. Step 6: Final answer
    x = 396.50

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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.