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Finding the Third Proportional to 178,632 and 390,744

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Solution

The third proportional to 178,632 and 390,744 is: 854,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    178,632 : 390,744 = 390,744 : x
  2. Step 2: Convert to fraction form
    178,632/390,744 = 390,744/x
  3. Step 3: Cross multiply
    178,632x = 390,744 × 390,744
  4. Step 4: Simplify right side
    178,632x = 152,680,873,536
  5. Step 5: Solve for x
    x = 152,680,873,536/178,632
  6. Step 6: Final answer
    x = 854,722.97

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.