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Finding the Third Proportional to 291,067 and 636,243

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Solution

The third proportional to 291,067 and 636,243 is: 1,390,762.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,067 : 636,243 = 636,243 : x
  2. Step 2: Convert to fraction form
    291,067/636,243 = 636,243/x
  3. Step 3: Cross multiply
    291,067x = 636,243 × 636,243
  4. Step 4: Simplify right side
    291,067x = 404,805,155,049
  5. Step 5: Solve for x
    x = 404,805,155,049/291,067
  6. Step 6: Final answer
    x = 1,390,762.80

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.