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Finding the Third Proportional to 820,328 and 1,283,921

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Solution

The third proportional to 820,328 and 1,283,921 is: 2,009,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,328 : 1,283,921 = 1,283,921 : x
  2. Step 2: Convert to fraction form
    820,328/1,283,921 = 1,283,921/x
  3. Step 3: Cross multiply
    820,328x = 1,283,921 × 1,283,921
  4. Step 4: Simplify right side
    820,328x = 1,648,453,134,241
  5. Step 5: Solve for x
    x = 1,648,453,134,241/820,328
  6. Step 6: Final answer
    x = 2,009,504.90

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.