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Finding the Third Proportional to 300.56 and 399.66

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Solution

The third proportional to 300.56 and 399.66 is: 531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    300.56 : 399.66 = 399.66 : x
  2. Step 2: Convert to fraction form
    300.56/399.66 = 399.66/x
  3. Step 3: Cross multiply
    300.56x = 399.66 × 399.66
  4. Step 4: Simplify right side
    300.56x = 159,725.12
  5. Step 5: Solve for x
    x = 159,725.12/300.56
  6. Step 6: Final answer
    x = 531.42

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.