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Finding the Third Proportional to 189,386.50 and 405,039.50

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Solution

The third proportional to 189,386.50 and 405,039.50 is: 866,254.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,386.50 : 405,039.50 = 405,039.50 : x
  2. Step 2: Convert to fraction form
    189,386.50/405,039.50 = 405,039.50/x
  3. Step 3: Cross multiply
    189,386.50x = 405,039.50 × 405,039.50
  4. Step 4: Simplify right side
    189,386.50x = 164,056,996,560.25
  5. Step 5: Solve for x
    x = 164,056,996,560.25/189,386.50
  6. Step 6: Final answer
    x = 866,254.97

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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.