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Finding the Third Proportional to 128.44 and 276.94

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Solution

The third proportional to 128.44 and 276.94 is: 597.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.44 : 276.94 = 276.94 : x
  2. Step 2: Convert to fraction form
    128.44/276.94 = 276.94/x
  3. Step 3: Cross multiply
    128.44x = 276.94 × 276.94
  4. Step 4: Simplify right side
    128.44x = 76,694.38
  5. Step 5: Solve for x
    x = 76,694.38/128.44
  6. Step 6: Final answer
    x = 597.13

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.