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Finding the Third Proportional to 517,821 and 699,610

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Solution

The third proportional to 517,821 and 699,610 is: 945,218.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    517,821 : 699,610 = 699,610 : x
  2. Step 2: Convert to fraction form
    517,821/699,610 = 699,610/x
  3. Step 3: Cross multiply
    517,821x = 699,610 × 699,610
  4. Step 4: Simplify right side
    517,821x = 489,454,152,100
  5. Step 5: Solve for x
    x = 489,454,152,100/517,821
  6. Step 6: Final answer
    x = 945,218.82

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.