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Finding the Third Proportional to 205,779 and 309,216

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Solution

The third proportional to 205,779 and 309,216 is: 464,646.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,779 : 309,216 = 309,216 : x
  2. Step 2: Convert to fraction form
    205,779/309,216 = 309,216/x
  3. Step 3: Cross multiply
    205,779x = 309,216 × 309,216
  4. Step 4: Simplify right side
    205,779x = 95,614,534,656
  5. Step 5: Solve for x
    x = 95,614,534,656/205,779
  6. Step 6: Final answer
    x = 464,646.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.