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Finding the Third Proportional to 279.28 and 433.97

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Solution

The third proportional to 279.28 and 433.97 is: 674.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.28 : 433.97 = 433.97 : x
  2. Step 2: Convert to fraction form
    279.28/433.97 = 433.97/x
  3. Step 3: Cross multiply
    279.28x = 433.97 × 433.97
  4. Step 4: Simplify right side
    279.28x = 188,328.88
  5. Step 5: Solve for x
    x = 188,328.88/279.28
  6. Step 6: Final answer
    x = 674.33

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.