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Finding the Third Proportional to 135.75 and 291.56

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Solution

The third proportional to 135.75 and 291.56 is: 626.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135.75 : 291.56 = 291.56 : x
  2. Step 2: Convert to fraction form
    135.75/291.56 = 291.56/x
  3. Step 3: Cross multiply
    135.75x = 291.56 × 291.56
  4. Step 4: Simplify right side
    135.75x = 85,008.69
  5. Step 5: Solve for x
    x = 85,008.69/135.75
  6. Step 6: Final answer
    x = 626.22

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.