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Finding the Third Proportional to 289,505 and 637,906

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Solution

The third proportional to 289,505 and 637,906 is: 1,405,585.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,505 : 637,906 = 637,906 : x
  2. Step 2: Convert to fraction form
    289,505/637,906 = 637,906/x
  3. Step 3: Cross multiply
    289,505x = 637,906 × 637,906
  4. Step 4: Simplify right side
    289,505x = 406,924,064,836
  5. Step 5: Solve for x
    x = 406,924,064,836/289,505
  6. Step 6: Final answer
    x = 1,405,585.62

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.