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Finding the Third Proportional to 306,078 and 661,338

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Solution

The third proportional to 306,078 and 661,338 is: 1,428,942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,078 : 661,338 = 661,338 : x
  2. Step 2: Convert to fraction form
    306,078/661,338 = 661,338/x
  3. Step 3: Cross multiply
    306,078x = 661,338 × 661,338
  4. Step 4: Simplify right side
    306,078x = 437,367,950,244
  5. Step 5: Solve for x
    x = 437,367,950,244/306,078
  6. Step 6: Final answer
    x = 1,428,942.79

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.