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Finding the Third Proportional to 331.25 and 725.50

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Solution

The third proportional to 331.25 and 725.50 is: 1,588.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    331.25 : 725.50 = 725.50 : x
  2. Step 2: Convert to fraction form
    331.25/725.50 = 725.50/x
  3. Step 3: Cross multiply
    331.25x = 725.50 × 725.50
  4. Step 4: Simplify right side
    331.25x = 526,350.25
  5. Step 5: Solve for x
    x = 526,350.25/331.25
  6. Step 6: Final answer
    x = 1,588.98

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.