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Finding the Third Proportional to 408.75 and 891.75

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Solution

The third proportional to 408.75 and 891.75 is: 1,945.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.75 : 891.75 = 891.75 : x
  2. Step 2: Convert to fraction form
    408.75/891.75 = 891.75/x
  3. Step 3: Cross multiply
    408.75x = 891.75 × 891.75
  4. Step 4: Simplify right side
    408.75x = 795,218.06
  5. Step 5: Solve for x
    x = 795,218.06/408.75
  6. Step 6: Final answer
    x = 1,945.49

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.