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Finding the Third Proportional to 278,616 and 418,548

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Solution

The third proportional to 278,616 and 418,548 is: 628,759.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,616 : 418,548 = 418,548 : x
  2. Step 2: Convert to fraction form
    278,616/418,548 = 418,548/x
  3. Step 3: Cross multiply
    278,616x = 418,548 × 418,548
  4. Step 4: Simplify right side
    278,616x = 175,182,428,304
  5. Step 5: Solve for x
    x = 175,182,428,304/278,616
  6. Step 6: Final answer
    x = 628,759.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.