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Finding the Third Proportional to 398,970 and 853,992

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Solution

The third proportional to 398,970 and 853,992 is: 1,827,962.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,970 : 853,992 = 853,992 : x
  2. Step 2: Convert to fraction form
    398,970/853,992 = 853,992/x
  3. Step 3: Cross multiply
    398,970x = 853,992 × 853,992
  4. Step 4: Simplify right side
    398,970x = 729,302,336,064
  5. Step 5: Solve for x
    x = 729,302,336,064/398,970
  6. Step 6: Final answer
    x = 1,827,962.84

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.