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Finding the Third Proportional to 136 and 290

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Solution

The third proportional to 136 and 290 is: 618.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136 : 290 = 290 : x
  2. Step 2: Convert to fraction form
    136/290 = 290/x
  3. Step 3: Cross multiply
    136x = 290 × 290
  4. Step 4: Simplify right side
    136x = 84,100
  5. Step 5: Solve for x
    x = 84,100/136
  6. Step 6: Final answer
    x = 618.38

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.