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Finding the Third Proportional to 203,485 and 311,275

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Solution

The third proportional to 203,485 and 311,275 is: 476,163.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,485 : 311,275 = 311,275 : x
  2. Step 2: Convert to fraction form
    203,485/311,275 = 311,275/x
  3. Step 3: Cross multiply
    203,485x = 311,275 × 311,275
  4. Step 4: Simplify right side
    203,485x = 96,892,125,625
  5. Step 5: Solve for x
    x = 96,892,125,625/203,485
  6. Step 6: Final answer
    x = 476,163.48

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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.