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Finding the Third Proportional to 398,954 and 865,722

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Solution

The third proportional to 398,954 and 865,722 is: 1,878,598.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,954 : 865,722 = 865,722 : x
  2. Step 2: Convert to fraction form
    398,954/865,722 = 865,722/x
  3. Step 3: Cross multiply
    398,954x = 865,722 × 865,722
  4. Step 4: Simplify right side
    398,954x = 749,474,581,284
  5. Step 5: Solve for x
    x = 749,474,581,284/398,954
  6. Step 6: Final answer
    x = 1,878,598.99

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.