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Finding the Third Proportional to 396,686 and 604,330

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Solution

The third proportional to 396,686 and 604,330 is: 920,664.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,686 : 604,330 = 604,330 : x
  2. Step 2: Convert to fraction form
    396,686/604,330 = 604,330/x
  3. Step 3: Cross multiply
    396,686x = 604,330 × 604,330
  4. Step 4: Simplify right side
    396,686x = 365,214,748,900
  5. Step 5: Solve for x
    x = 365,214,748,900/396,686
  6. Step 6: Final answer
    x = 920,664.58

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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.