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Finding the Third Proportional to 371.50 and 859.75

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Solution

The third proportional to 371.50 and 859.75 is: 1,989.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.50 : 859.75 = 859.75 : x
  2. Step 2: Convert to fraction form
    371.50/859.75 = 859.75/x
  3. Step 3: Cross multiply
    371.50x = 859.75 × 859.75
  4. Step 4: Simplify right side
    371.50x = 739,170.06
  5. Step 5: Solve for x
    x = 739,170.06/371.50
  6. Step 6: Final answer
    x = 1,989.69

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.