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Finding the Third Proportional to 321,715 and 706,880

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Solution

The third proportional to 321,715 and 706,880 is: 1,553,173.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,715 : 706,880 = 706,880 : x
  2. Step 2: Convert to fraction form
    321,715/706,880 = 706,880/x
  3. Step 3: Cross multiply
    321,715x = 706,880 × 706,880
  4. Step 4: Simplify right side
    321,715x = 499,679,334,400
  5. Step 5: Solve for x
    x = 499,679,334,400/321,715
  6. Step 6: Final answer
    x = 1,553,173.88

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.