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Finding the Third Proportional to 189,378 and 408,274

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Solution

The third proportional to 189,378 and 408,274 is: 880,184.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,378 : 408,274 = 408,274 : x
  2. Step 2: Convert to fraction form
    189,378/408,274 = 408,274/x
  3. Step 3: Cross multiply
    189,378x = 408,274 × 408,274
  4. Step 4: Simplify right side
    189,378x = 166,687,659,076
  5. Step 5: Solve for x
    x = 166,687,659,076/189,378
  6. Step 6: Final answer
    x = 880,184.92

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.