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Finding the Third Proportional to 648,221 and 981,278

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Solution

The third proportional to 648,221 and 981,278 is: 1,485,460.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,221 : 981,278 = 981,278 : x
  2. Step 2: Convert to fraction form
    648,221/981,278 = 981,278/x
  3. Step 3: Cross multiply
    648,221x = 981,278 × 981,278
  4. Step 4: Simplify right side
    648,221x = 962,906,513,284
  5. Step 5: Solve for x
    x = 962,906,513,284/648,221
  6. Step 6: Final answer
    x = 1,485,460.23

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.