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Finding the Third Proportional to 373,909 and 815,486

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Solution

The third proportional to 373,909 and 815,486 is: 1,778,554.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,909 : 815,486 = 815,486 : x
  2. Step 2: Convert to fraction form
    373,909/815,486 = 815,486/x
  3. Step 3: Cross multiply
    373,909x = 815,486 × 815,486
  4. Step 4: Simplify right side
    373,909x = 665,017,416,196
  5. Step 5: Solve for x
    x = 665,017,416,196/373,909
  6. Step 6: Final answer
    x = 1,778,554.18

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.