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Finding the Third Proportional to 342.75 and 672

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Solution

The third proportional to 342.75 and 672 is: 1,317.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.75 : 672 = 672 : x
  2. Step 2: Convert to fraction form
    342.75/672 = 672/x
  3. Step 3: Cross multiply
    342.75x = 672 × 672
  4. Step 4: Simplify right side
    342.75x = 451,584
  5. Step 5: Solve for x
    x = 451,584/342.75
  6. Step 6: Final answer
    x = 1,317.53

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Why These Related Problems?

These problems maintain the same ratio (1.96) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.