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Finding the Third Proportional to 202.92 and 279.28

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Solution

The third proportional to 202.92 and 279.28 is: 384.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.92 : 279.28 = 279.28 : x
  2. Step 2: Convert to fraction form
    202.92/279.28 = 279.28/x
  3. Step 3: Cross multiply
    202.92x = 279.28 × 279.28
  4. Step 4: Simplify right side
    202.92x = 77,998.02
  5. Step 5: Solve for x
    x = 77,998.02/202.92
  6. Step 6: Final answer
    x = 384.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.