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Finding the Third Proportional to 373.78 and 813.09

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Solution

The third proportional to 373.78 and 813.09 is: 1,768.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.78 : 813.09 = 813.09 : x
  2. Step 2: Convert to fraction form
    373.78/813.09 = 813.09/x
  3. Step 3: Cross multiply
    373.78x = 813.09 × 813.09
  4. Step 4: Simplify right side
    373.78x = 661,121.45
  5. Step 5: Solve for x
    x = 661,121.45/373.78
  6. Step 6: Final answer
    x = 1,768.74

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.