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Finding the Third Proportional to 133.45 and 289.13

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Solution

The third proportional to 133.45 and 289.13 is: 626.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    133.45 : 289.13 = 289.13 : x
  2. Step 2: Convert to fraction form
    133.45/289.13 = 289.13/x
  3. Step 3: Cross multiply
    133.45x = 289.13 × 289.13
  4. Step 4: Simplify right side
    133.45x = 83,593.27
  5. Step 5: Solve for x
    x = 83,593.27/133.45
  6. Step 6: Final answer
    x = 626.39

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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.