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Finding the Third Proportional to 451,312 and 991,196

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Solution

The third proportional to 451,312 and 991,196 is: 2,176,918.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,312 : 991,196 = 991,196 : x
  2. Step 2: Convert to fraction form
    451,312/991,196 = 991,196/x
  3. Step 3: Cross multiply
    451,312x = 991,196 × 991,196
  4. Step 4: Simplify right side
    451,312x = 982,469,510,416
  5. Step 5: Solve for x
    x = 982,469,510,416/451,312
  6. Step 6: Final answer
    x = 2,176,918.65

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.