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Finding the Third Proportional to 407,722 and 921,145

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Solution

The third proportional to 407,722 and 921,145 is: 2,081,094.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,722 : 921,145 = 921,145 : x
  2. Step 2: Convert to fraction form
    407,722/921,145 = 921,145/x
  3. Step 3: Cross multiply
    407,722x = 921,145 × 921,145
  4. Step 4: Simplify right side
    407,722x = 848,508,111,025
  5. Step 5: Solve for x
    x = 848,508,111,025/407,722
  6. Step 6: Final answer
    x = 2,081,094.74

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Why These Related Problems?

These problems maintain the same ratio (2.26) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.