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Finding the Third Proportional to 206,740 and 311,316

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Solution

The third proportional to 206,740 and 311,316 is: 468,790.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,740 : 311,316 = 311,316 : x
  2. Step 2: Convert to fraction form
    206,740/311,316 = 311,316/x
  3. Step 3: Cross multiply
    206,740x = 311,316 × 311,316
  4. Step 4: Simplify right side
    206,740x = 96,917,651,856
  5. Step 5: Solve for x
    x = 96,917,651,856/206,740
  6. Step 6: Final answer
    x = 468,790.04

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.