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Finding the Third Proportional to 399,658 and 858,608

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Solution

The third proportional to 399,658 and 858,608 is: 1,844,596.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,658 : 858,608 = 858,608 : x
  2. Step 2: Convert to fraction form
    399,658/858,608 = 858,608/x
  3. Step 3: Cross multiply
    399,658x = 858,608 × 858,608
  4. Step 4: Simplify right side
    399,658x = 737,207,697,664
  5. Step 5: Solve for x
    x = 737,207,697,664/399,658
  6. Step 6: Final answer
    x = 1,844,596.37

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.