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Finding the Third Proportional to 418,436 and 921,328

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Solution

The third proportional to 418,436 and 921,328 is: 2,028,614.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,436 : 921,328 = 921,328 : x
  2. Step 2: Convert to fraction form
    418,436/921,328 = 921,328/x
  3. Step 3: Cross multiply
    418,436x = 921,328 × 921,328
  4. Step 4: Simplify right side
    418,436x = 848,845,283,584
  5. Step 5: Solve for x
    x = 848,845,283,584/418,436
  6. Step 6: Final answer
    x = 2,028,614.37

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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.