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Finding the Third Proportional to 189,607 and 405,458

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Solution

The third proportional to 189,607 and 405,458 is: 867,036.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,607 : 405,458 = 405,458 : x
  2. Step 2: Convert to fraction form
    189,607/405,458 = 405,458/x
  3. Step 3: Cross multiply
    189,607x = 405,458 × 405,458
  4. Step 4: Simplify right side
    189,607x = 164,396,189,764
  5. Step 5: Solve for x
    x = 164,396,189,764/189,607
  6. Step 6: Final answer
    x = 867,036.50

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.