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Finding the Third Proportional to 128.14 and 277.17

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Solution

The third proportional to 128.14 and 277.17 is: 599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128.14 : 277.17 = 277.17 : x
  2. Step 2: Convert to fraction form
    128.14/277.17 = 277.17/x
  3. Step 3: Cross multiply
    128.14x = 277.17 × 277.17
  4. Step 4: Simplify right side
    128.14x = 76,824.25
  5. Step 5: Solve for x
    x = 76,824.25/128.14
  6. Step 6: Final answer
    x = 599.51

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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.