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Finding the Third Proportional to 279.94 and 441.28

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Solution

The third proportional to 279.94 and 441.28 is: 695.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.94 : 441.28 = 441.28 : x
  2. Step 2: Convert to fraction form
    279.94/441.28 = 441.28/x
  3. Step 3: Cross multiply
    279.94x = 441.28 × 441.28
  4. Step 4: Simplify right side
    279.94x = 194,729.14
  5. Step 5: Solve for x
    x = 194,729.14/279.94
  6. Step 6: Final answer
    x = 695.62

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.