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Finding the Third Proportional to 825.50 and 1,729

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Solution

The third proportional to 825.50 and 1,729 is: 3,621.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.50 : 1,729 = 1,729 : x
  2. Step 2: Convert to fraction form
    825.50/1,729 = 1,729/x
  3. Step 3: Cross multiply
    825.50x = 1,729 × 1,729
  4. Step 4: Simplify right side
    825.50x = 2,989,441
  5. Step 5: Solve for x
    x = 2,989,441/825.50
  6. Step 6: Final answer
    x = 3,621.37

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.