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Finding the Third Proportional to 291,140 and 636,589

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Solution

The third proportional to 291,140 and 636,589 is: 1,391,926.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,140 : 636,589 = 636,589 : x
  2. Step 2: Convert to fraction form
    291,140/636,589 = 636,589/x
  3. Step 3: Cross multiply
    291,140x = 636,589 × 636,589
  4. Step 4: Simplify right side
    291,140x = 405,245,554,921
  5. Step 5: Solve for x
    x = 405,245,554,921/291,140
  6. Step 6: Final answer
    x = 1,391,926.75

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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.