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Finding the Third Proportional to 408,278 and 612,825

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Solution

The third proportional to 408,278 and 612,825 is: 919,849.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,278 : 612,825 = 612,825 : x
  2. Step 2: Convert to fraction form
    408,278/612,825 = 612,825/x
  3. Step 3: Cross multiply
    408,278x = 612,825 × 612,825
  4. Step 4: Simplify right side
    408,278x = 375,554,480,625
  5. Step 5: Solve for x
    x = 375,554,480,625/408,278
  6. Step 6: Final answer
    x = 919,849.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.