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Finding the Third Proportional to 189,927 and 405,278

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Solution

The third proportional to 189,927 and 405,278 is: 864,807.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,927 : 405,278 = 405,278 : x
  2. Step 2: Convert to fraction form
    189,927/405,278 = 405,278/x
  3. Step 3: Cross multiply
    189,927x = 405,278 × 405,278
  4. Step 4: Simplify right side
    189,927x = 164,250,257,284
  5. Step 5: Solve for x
    x = 164,250,257,284/189,927
  6. Step 6: Final answer
    x = 864,807.31

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.