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Finding the Third Proportional to 311,609 and 445,611

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Solution

The third proportional to 311,609 and 445,611 is: 637,238.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,609 : 445,611 = 445,611 : x
  2. Step 2: Convert to fraction form
    311,609/445,611 = 445,611/x
  3. Step 3: Cross multiply
    311,609x = 445,611 × 445,611
  4. Step 4: Simplify right side
    311,609x = 198,569,163,321
  5. Step 5: Solve for x
    x = 198,569,163,321/311,609
  6. Step 6: Final answer
    x = 637,238.22

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.