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Finding the Third Proportional to 278,344 and 620,436

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Solution

The third proportional to 278,344 and 620,436 is: 1,382,967.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,344 : 620,436 = 620,436 : x
  2. Step 2: Convert to fraction form
    278,344/620,436 = 620,436/x
  3. Step 3: Cross multiply
    278,344x = 620,436 × 620,436
  4. Step 4: Simplify right side
    278,344x = 384,940,830,096
  5. Step 5: Solve for x
    x = 384,940,830,096/278,344
  6. Step 6: Final answer
    x = 1,382,967.95

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Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.