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Finding the Third Proportional to 204,109 and 321,817

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Solution

The third proportional to 204,109 and 321,817 is: 507,406.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    204,109 : 321,817 = 321,817 : x
  2. Step 2: Convert to fraction form
    204,109/321,817 = 321,817/x
  3. Step 3: Cross multiply
    204,109x = 321,817 × 321,817
  4. Step 4: Simplify right side
    204,109x = 103,566,181,489
  5. Step 5: Solve for x
    x = 103,566,181,489/204,109
  6. Step 6: Final answer
    x = 507,406.25

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.