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Finding the Third Proportional to 442,940 and 687,161

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Solution

The third proportional to 442,940 and 687,161 is: 1,066,036.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,940 : 687,161 = 687,161 : x
  2. Step 2: Convert to fraction form
    442,940/687,161 = 687,161/x
  3. Step 3: Cross multiply
    442,940x = 687,161 × 687,161
  4. Step 4: Simplify right side
    442,940x = 472,190,239,921
  5. Step 5: Solve for x
    x = 472,190,239,921/442,940
  6. Step 6: Final answer
    x = 1,066,036.57

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.