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Finding the Third Proportional to 313.25 and 674.50

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Solution

The third proportional to 313.25 and 674.50 is: 1,452.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.25 : 674.50 = 674.50 : x
  2. Step 2: Convert to fraction form
    313.25/674.50 = 674.50/x
  3. Step 3: Cross multiply
    313.25x = 674.50 × 674.50
  4. Step 4: Simplify right side
    313.25x = 454,950.25
  5. Step 5: Solve for x
    x = 454,950.25/313.25
  6. Step 6: Final answer
    x = 1,452.36

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.