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Finding the Third Proportional to 379.55 and 818.30

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Solution

The third proportional to 379.55 and 818.30 is: 1,764.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.55 : 818.30 = 818.30 : x
  2. Step 2: Convert to fraction form
    379.55/818.30 = 818.30/x
  3. Step 3: Cross multiply
    379.55x = 818.30 × 818.30
  4. Step 4: Simplify right side
    379.55x = 669,609.78
  5. Step 5: Solve for x
    x = 669,609.78/379.55
  6. Step 6: Final answer
    x = 1,764.23

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.