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Finding the Third Proportional to 438,211 and 660,200

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Solution

The third proportional to 438,211 and 660,200 is: 994,644.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,211 : 660,200 = 660,200 : x
  2. Step 2: Convert to fraction form
    438,211/660,200 = 660,200/x
  3. Step 3: Cross multiply
    438,211x = 660,200 × 660,200
  4. Step 4: Simplify right side
    438,211x = 435,864,040,000
  5. Step 5: Solve for x
    x = 435,864,040,000/438,211
  6. Step 6: Final answer
    x = 994,644.22

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.