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Finding the Third Proportional to 190,456 and 418,272

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Solution

The third proportional to 190,456 and 418,272 is: 918,592.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,456 : 418,272 = 418,272 : x
  2. Step 2: Convert to fraction form
    190,456/418,272 = 418,272/x
  3. Step 3: Cross multiply
    190,456x = 418,272 × 418,272
  4. Step 4: Simplify right side
    190,456x = 174,951,465,984
  5. Step 5: Solve for x
    x = 174,951,465,984/190,456
  6. Step 6: Final answer
    x = 918,592.57

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.