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Finding the Third Proportional to 321,548 and 679,176

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Solution

The third proportional to 321,548 and 679,176 is: 1,434,560.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,548 : 679,176 = 679,176 : x
  2. Step 2: Convert to fraction form
    321,548/679,176 = 679,176/x
  3. Step 3: Cross multiply
    321,548x = 679,176 × 679,176
  4. Step 4: Simplify right side
    321,548x = 461,280,038,976
  5. Step 5: Solve for x
    x = 461,280,038,976/321,548
  6. Step 6: Final answer
    x = 1,434,560.44

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.