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Finding the Third Proportional to 321,488 and 698,338

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Solution

The third proportional to 321,488 and 698,338 is: 1,516,933.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,488 : 698,338 = 698,338 : x
  2. Step 2: Convert to fraction form
    321,488/698,338 = 698,338/x
  3. Step 3: Cross multiply
    321,488x = 698,338 × 698,338
  4. Step 4: Simplify right side
    321,488x = 487,675,962,244
  5. Step 5: Solve for x
    x = 487,675,962,244/321,488
  6. Step 6: Final answer
    x = 1,516,933.64

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.