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Finding the Third Proportional to 311,901 and 656,397

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Solution

The third proportional to 311,901 and 656,397 is: 1,381,390.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,901 : 656,397 = 656,397 : x
  2. Step 2: Convert to fraction form
    311,901/656,397 = 656,397/x
  3. Step 3: Cross multiply
    311,901x = 656,397 × 656,397
  4. Step 4: Simplify right side
    311,901x = 430,857,021,609
  5. Step 5: Solve for x
    x = 430,857,021,609/311,901
  6. Step 6: Final answer
    x = 1,381,390.32

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.