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Finding the Third Proportional to 718,504 and 999,021

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Solution

The third proportional to 718,504 and 999,021 is: 1,389,056.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,504 : 999,021 = 999,021 : x
  2. Step 2: Convert to fraction form
    718,504/999,021 = 999,021/x
  3. Step 3: Cross multiply
    718,504x = 999,021 × 999,021
  4. Step 4: Simplify right side
    718,504x = 998,042,958,441
  5. Step 5: Solve for x
    x = 998,042,958,441/718,504
  6. Step 6: Final answer
    x = 1,389,056.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.