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Finding the Third Proportional to 279.19 and 408.56

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Solution

The third proportional to 279.19 and 408.56 is: 597.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.19 : 408.56 = 408.56 : x
  2. Step 2: Convert to fraction form
    279.19/408.56 = 408.56/x
  3. Step 3: Cross multiply
    279.19x = 408.56 × 408.56
  4. Step 4: Simplify right side
    279.19x = 166,923.32
  5. Step 5: Solve for x
    x = 166,923.32/279.19
  6. Step 6: Final answer
    x = 597.89

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.