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Finding the Third Proportional to 203,916 and 311,058

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Solution

The third proportional to 203,916 and 311,058 is: 474,494.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,916 : 311,058 = 311,058 : x
  2. Step 2: Convert to fraction form
    203,916/311,058 = 311,058/x
  3. Step 3: Cross multiply
    203,916x = 311,058 × 311,058
  4. Step 4: Simplify right side
    203,916x = 96,757,079,364
  5. Step 5: Solve for x
    x = 96,757,079,364/203,916
  6. Step 6: Final answer
    x = 474,494.79

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.