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Finding the Third Proportional to 389,658 and 839,508

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Solution

The third proportional to 389,658 and 839,508 is: 1,808,698.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,658 : 839,508 = 839,508 : x
  2. Step 2: Convert to fraction form
    389,658/839,508 = 839,508/x
  3. Step 3: Cross multiply
    389,658x = 839,508 × 839,508
  4. Step 4: Simplify right side
    389,658x = 704,773,682,064
  5. Step 5: Solve for x
    x = 704,773,682,064/389,658
  6. Step 6: Final answer
    x = 1,808,698.09

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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.