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Finding the Third Proportional to 391,266 and 813,144

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Solution

The third proportional to 391,266 and 813,144 is: 1,689,907.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,266 : 813,144 = 813,144 : x
  2. Step 2: Convert to fraction form
    391,266/813,144 = 813,144/x
  3. Step 3: Cross multiply
    391,266x = 813,144 × 813,144
  4. Step 4: Simplify right side
    391,266x = 661,203,164,736
  5. Step 5: Solve for x
    x = 661,203,164,736/391,266
  6. Step 6: Final answer
    x = 1,689,907.03

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Why These Related Problems?

These problems maintain the same ratio (2.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.