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Finding the Third Proportional to 191,487 and 403,872

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Solution

The third proportional to 191,487 and 403,872 is: 851,820.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,487 : 403,872 = 403,872 : x
  2. Step 2: Convert to fraction form
    191,487/403,872 = 403,872/x
  3. Step 3: Cross multiply
    191,487x = 403,872 × 403,872
  4. Step 4: Simplify right side
    191,487x = 163,112,592,384
  5. Step 5: Solve for x
    x = 163,112,592,384/191,487
  6. Step 6: Final answer
    x = 851,820.71

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.