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Finding the Third Proportional to 393,620 and 862,892

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Solution

The third proportional to 393,620 and 862,892 is: 1,891,627.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,620 : 862,892 = 862,892 : x
  2. Step 2: Convert to fraction form
    393,620/862,892 = 862,892/x
  3. Step 3: Cross multiply
    393,620x = 862,892 × 862,892
  4. Step 4: Simplify right side
    393,620x = 744,582,603,664
  5. Step 5: Solve for x
    x = 744,582,603,664/393,620
  6. Step 6: Final answer
    x = 1,891,627.98

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.