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Finding the Third Proportional to 396,668 and 872,064

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Solution

The third proportional to 396,668 and 872,064 is: 1,917,209.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,668 : 872,064 = 872,064 : x
  2. Step 2: Convert to fraction form
    396,668/872,064 = 872,064/x
  3. Step 3: Cross multiply
    396,668x = 872,064 × 872,064
  4. Step 4: Simplify right side
    396,668x = 760,495,620,096
  5. Step 5: Solve for x
    x = 760,495,620,096/396,668
  6. Step 6: Final answer
    x = 1,917,209.40

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.