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Finding the Third Proportional to 136 and 356

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Solution

The third proportional to 136 and 356 is: 931.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    136 : 356 = 356 : x
  2. Step 2: Convert to fraction form
    136/356 = 356/x
  3. Step 3: Cross multiply
    136x = 356 × 356
  4. Step 4: Simplify right side
    136x = 126,736
  5. Step 5: Solve for x
    x = 126,736/136
  6. Step 6: Final answer
    x = 931.88

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Why These Related Problems?

These problems maintain the same ratio (2.62) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.