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Finding the Third Proportional to 189,913 and 409,077

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Solution

The third proportional to 189,913 and 409,077 is: 881,161.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,913 : 409,077 = 409,077 : x
  2. Step 2: Convert to fraction form
    189,913/409,077 = 409,077/x
  3. Step 3: Cross multiply
    189,913x = 409,077 × 409,077
  4. Step 4: Simplify right side
    189,913x = 167,343,991,929
  5. Step 5: Solve for x
    x = 167,343,991,929/189,913
  6. Step 6: Final answer
    x = 881,161.33

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.