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Finding the Third Proportional to 396,678 and 604,315

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Solution

The third proportional to 396,678 and 604,315 is: 920,637.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,678 : 604,315 = 604,315 : x
  2. Step 2: Convert to fraction form
    396,678/604,315 = 604,315/x
  3. Step 3: Cross multiply
    396,678x = 604,315 × 604,315
  4. Step 4: Simplify right side
    396,678x = 365,196,619,225
  5. Step 5: Solve for x
    x = 365,196,619,225/396,678
  6. Step 6: Final answer
    x = 920,637.44

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.