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Finding the Third Proportional to 322,288 and 691,216

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Solution

The third proportional to 322,288 and 691,216 is: 1,482,461.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    322,288 : 691,216 = 691,216 : x
  2. Step 2: Convert to fraction form
    322,288/691,216 = 691,216/x
  3. Step 3: Cross multiply
    322,288x = 691,216 × 691,216
  4. Step 4: Simplify right side
    322,288x = 477,779,558,656
  5. Step 5: Solve for x
    x = 477,779,558,656/322,288
  6. Step 6: Final answer
    x = 1,482,461.52

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.