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Finding the Third Proportional to 612,965 and 920,285

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Solution

The third proportional to 612,965 and 920,285 is: 1,381,684.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,965 : 920,285 = 920,285 : x
  2. Step 2: Convert to fraction form
    612,965/920,285 = 920,285/x
  3. Step 3: Cross multiply
    612,965x = 920,285 × 920,285
  4. Step 4: Simplify right side
    612,965x = 846,924,481,225
  5. Step 5: Solve for x
    x = 846,924,481,225/612,965
  6. Step 6: Final answer
    x = 1,381,684.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.