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Finding the Third Proportional to 271,855 and 639,621

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Solution

The third proportional to 271,855 and 639,621 is: 1,504,901.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    271,855 : 639,621 = 639,621 : x
  2. Step 2: Convert to fraction form
    271,855/639,621 = 639,621/x
  3. Step 3: Cross multiply
    271,855x = 639,621 × 639,621
  4. Step 4: Simplify right side
    271,855x = 409,115,023,641
  5. Step 5: Solve for x
    x = 409,115,023,641/271,855
  6. Step 6: Final answer
    x = 1,504,901.60

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Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.