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Finding the Third Proportional to 366.75 and 397.69

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Solution

The third proportional to 366.75 and 397.69 is: 431.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.75 : 397.69 = 397.69 : x
  2. Step 2: Convert to fraction form
    366.75/397.69 = 397.69/x
  3. Step 3: Cross multiply
    366.75x = 397.69 × 397.69
  4. Step 4: Simplify right side
    366.75x = 158,155.35
  5. Step 5: Solve for x
    x = 158,155.35/366.75
  6. Step 6: Final answer
    x = 431.23

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.