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Finding the Third Proportional to 316,692 and 664,104

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Solution

The third proportional to 316,692 and 664,104 is: 1,392,627.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,692 : 664,104 = 664,104 : x
  2. Step 2: Convert to fraction form
    316,692/664,104 = 664,104/x
  3. Step 3: Cross multiply
    316,692x = 664,104 × 664,104
  4. Step 4: Simplify right side
    316,692x = 441,034,122,816
  5. Step 5: Solve for x
    x = 441,034,122,816/316,692
  6. Step 6: Final answer
    x = 1,392,627.92

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.