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Finding the Third Proportional to 393,885 and 625,278

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Solution

The third proportional to 393,885 and 625,278 is: 992,605.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,885 : 625,278 = 625,278 : x
  2. Step 2: Convert to fraction form
    393,885/625,278 = 625,278/x
  3. Step 3: Cross multiply
    393,885x = 625,278 × 625,278
  4. Step 4: Simplify right side
    393,885x = 390,972,577,284
  5. Step 5: Solve for x
    x = 390,972,577,284/393,885
  6. Step 6: Final answer
    x = 992,605.91

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.