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Finding the Third Proportional to 379,840 and 810,530

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Solution

The third proportional to 379,840 and 810,530 is: 1,729,567.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,840 : 810,530 = 810,530 : x
  2. Step 2: Convert to fraction form
    379,840/810,530 = 810,530/x
  3. Step 3: Cross multiply
    379,840x = 810,530 × 810,530
  4. Step 4: Simplify right side
    379,840x = 656,958,880,900
  5. Step 5: Solve for x
    x = 656,958,880,900/379,840
  6. Step 6: Final answer
    x = 1,729,567.40

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.