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Finding the Third Proportional to 289.88 and 363.38

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Solution

The third proportional to 289.88 and 363.38 is: 455.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.88 : 363.38 = 363.38 : x
  2. Step 2: Convert to fraction form
    289.88/363.38 = 363.38/x
  3. Step 3: Cross multiply
    289.88x = 363.38 × 363.38
  4. Step 4: Simplify right side
    289.88x = 132,041.39
  5. Step 5: Solve for x
    x = 132,041.39/289.88
  6. Step 6: Final answer
    x = 455.51

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Why These Related Problems?

These problems maintain the same ratio (1.25) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.