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Finding the Third Proportional to 635,439 and 990,669

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Solution

The third proportional to 635,439 and 990,669 is: 1,544,483.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    635,439 : 990,669 = 990,669 : x
  2. Step 2: Convert to fraction form
    635,439/990,669 = 990,669/x
  3. Step 3: Cross multiply
    635,439x = 990,669 × 990,669
  4. Step 4: Simplify right side
    635,439x = 981,425,067,561
  5. Step 5: Solve for x
    x = 981,425,067,561/635,439
  6. Step 6: Final answer
    x = 1,544,483.53

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.