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Finding the Third Proportional to 398,989.50 and 853,275

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Solution

The third proportional to 398,989.50 and 853,275 is: 1,824,805.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,989.50 : 853,275 = 853,275 : x
  2. Step 2: Convert to fraction form
    398,989.50/853,275 = 853,275/x
  3. Step 3: Cross multiply
    398,989.50x = 853,275 × 853,275
  4. Step 4: Simplify right side
    398,989.50x = 728,078,225,625
  5. Step 5: Solve for x
    x = 728,078,225,625/398,989.50
  6. Step 6: Final answer
    x = 1,824,805.48

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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.