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Finding the Third Proportional to 189,171 and 387,090

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Solution

The third proportional to 189,171 and 387,090 is: 792,080.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    189,171 : 387,090 = 387,090 : x
  2. Step 2: Convert to fraction form
    189,171/387,090 = 387,090/x
  3. Step 3: Cross multiply
    189,171x = 387,090 × 387,090
  4. Step 4: Simplify right side
    189,171x = 149,838,668,100
  5. Step 5: Solve for x
    x = 149,838,668,100/189,171
  6. Step 6: Final answer
    x = 792,080.54

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.