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Finding the Third Proportional to 290,409 and 625,317

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Solution

The third proportional to 290,409 and 625,317 is: 1,346,450.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,409 : 625,317 = 625,317 : x
  2. Step 2: Convert to fraction form
    290,409/625,317 = 625,317/x
  3. Step 3: Cross multiply
    290,409x = 625,317 × 625,317
  4. Step 4: Simplify right side
    290,409x = 391,021,350,489
  5. Step 5: Solve for x
    x = 391,021,350,489/290,409
  6. Step 6: Final answer
    x = 1,346,450.52

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.