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Finding the Third Proportional to 313.25 and 348.50

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Solution

The third proportional to 313.25 and 348.50 is: 387.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    313.25 : 348.50 = 348.50 : x
  2. Step 2: Convert to fraction form
    313.25/348.50 = 348.50/x
  3. Step 3: Cross multiply
    313.25x = 348.50 × 348.50
  4. Step 4: Simplify right side
    313.25x = 121,452.25
  5. Step 5: Solve for x
    x = 121,452.25/313.25
  6. Step 6: Final answer
    x = 387.72

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.