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Finding the Third Proportional to 279 and 363.75

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Solution

The third proportional to 279 and 363.75 is: 474.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279 : 363.75 = 363.75 : x
  2. Step 2: Convert to fraction form
    279/363.75 = 363.75/x
  3. Step 3: Cross multiply
    279x = 363.75 × 363.75
  4. Step 4: Simplify right side
    279x = 132,314.06
  5. Step 5: Solve for x
    x = 132,314.06/279
  6. Step 6: Final answer
    x = 474.24

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.