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Finding the Third Proportional to 916,779 and 1,991,328

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Solution

The third proportional to 916,779 and 1,991,328 is: 4,325,346.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,779 : 1,991,328 = 1,991,328 : x
  2. Step 2: Convert to fraction form
    916,779/1,991,328 = 1,991,328/x
  3. Step 3: Cross multiply
    916,779x = 1,991,328 × 1,991,328
  4. Step 4: Simplify right side
    916,779x = 3,965,387,203,584
  5. Step 5: Solve for x
    x = 3,965,387,203,584/916,779
  6. Step 6: Final answer
    x = 4,325,346.90

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.