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Finding the Third Proportional to 398,884 and 860,381

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Solution

The third proportional to 398,884 and 860,381 is: 1,855,816.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,884 : 860,381 = 860,381 : x
  2. Step 2: Convert to fraction form
    398,884/860,381 = 860,381/x
  3. Step 3: Cross multiply
    398,884x = 860,381 × 860,381
  4. Step 4: Simplify right side
    398,884x = 740,255,465,161
  5. Step 5: Solve for x
    x = 740,255,465,161/398,884
  6. Step 6: Final answer
    x = 1,855,816.39

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.