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Finding the Third Proportional to 285,169.50 and 398,691

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Solution

The third proportional to 285,169.50 and 398,691 is: 557,403.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,169.50 : 398,691 = 398,691 : x
  2. Step 2: Convert to fraction form
    285,169.50/398,691 = 398,691/x
  3. Step 3: Cross multiply
    285,169.50x = 398,691 × 398,691
  4. Step 4: Simplify right side
    285,169.50x = 158,954,513,481
  5. Step 5: Solve for x
    x = 158,954,513,481/285,169.50
  6. Step 6: Final answer
    x = 557,403.63

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.