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Finding the Third Proportional to 181,290 and 398,828

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Solution

The third proportional to 181,290 and 398,828 is: 877,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,290 : 398,828 = 398,828 : x
  2. Step 2: Convert to fraction form
    181,290/398,828 = 398,828/x
  3. Step 3: Cross multiply
    181,290x = 398,828 × 398,828
  4. Step 4: Simplify right side
    181,290x = 159,063,773,584
  5. Step 5: Solve for x
    x = 159,063,773,584/181,290
  6. Step 6: Final answer
    x = 877,399.60

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.