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Finding the Third Proportional to 321,990 and 706,188

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Solution

The third proportional to 321,990 and 706,188 is: 1,548,810.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,990 : 706,188 = 706,188 : x
  2. Step 2: Convert to fraction form
    321,990/706,188 = 706,188/x
  3. Step 3: Cross multiply
    321,990x = 706,188 × 706,188
  4. Step 4: Simplify right side
    321,990x = 498,701,491,344
  5. Step 5: Solve for x
    x = 498,701,491,344/321,990
  6. Step 6: Final answer
    x = 1,548,810.50

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.