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Finding the Third Proportional to 611.25 and 852.75

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Solution

The third proportional to 611.25 and 852.75 is: 1,189.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.25 : 852.75 = 852.75 : x
  2. Step 2: Convert to fraction form
    611.25/852.75 = 852.75/x
  3. Step 3: Cross multiply
    611.25x = 852.75 × 852.75
  4. Step 4: Simplify right side
    611.25x = 727,182.56
  5. Step 5: Solve for x
    x = 727,182.56/611.25
  6. Step 6: Final answer
    x = 1,189.66

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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.