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Finding the Third Proportional to 420,049 and 921,739

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Solution

The third proportional to 420,049 and 921,739 is: 2,022,627.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,049 : 921,739 = 921,739 : x
  2. Step 2: Convert to fraction form
    420,049/921,739 = 921,739/x
  3. Step 3: Cross multiply
    420,049x = 921,739 × 921,739
  4. Step 4: Simplify right side
    420,049x = 849,602,784,121
  5. Step 5: Solve for x
    x = 849,602,784,121/420,049
  6. Step 6: Final answer
    x = 2,022,627.80

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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.