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Finding the Third Proportional to 133.56 and 289.88

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Solution

The third proportional to 133.56 and 289.88 is: 629.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.56 : 289.88 = 289.88 : x
  2. Step 2: Convert to fraction form
    133.56/289.88 = 289.88/x
  3. Step 3: Cross multiply
    133.56x = 289.88 × 289.88
  4. Step 4: Simplify right side
    133.56x = 84,027.52
  5. Step 5: Solve for x
    x = 84,027.52/133.56
  6. Step 6: Final answer
    x = 629.13

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.