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Finding the Third Proportional to 678,441 and 921,382

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Solution

The third proportional to 678,441 and 921,382 is: 1,251,317.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,441 : 921,382 = 921,382 : x
  2. Step 2: Convert to fraction form
    678,441/921,382 = 921,382/x
  3. Step 3: Cross multiply
    678,441x = 921,382 × 921,382
  4. Step 4: Simplify right side
    678,441x = 848,944,789,924
  5. Step 5: Solve for x
    x = 848,944,789,924/678,441
  6. Step 6: Final answer
    x = 1,251,317.05

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.