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Finding the Third Proportional to 380.13 and 819.56

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Solution

The third proportional to 380.13 and 819.56 is: 1,767.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.13 : 819.56 = 819.56 : x
  2. Step 2: Convert to fraction form
    380.13/819.56 = 819.56/x
  3. Step 3: Cross multiply
    380.13x = 819.56 × 819.56
  4. Step 4: Simplify right side
    380.13x = 671,682.69
  5. Step 5: Solve for x
    x = 671,682.69/380.13
  6. Step 6: Final answer
    x = 1,767.00

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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.