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Finding the Third Proportional to 378.94 and 804.56

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Solution

The third proportional to 378.94 and 804.56 is: 1,708.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.94 : 804.56 = 804.56 : x
  2. Step 2: Convert to fraction form
    378.94/804.56 = 804.56/x
  3. Step 3: Cross multiply
    378.94x = 804.56 × 804.56
  4. Step 4: Simplify right side
    378.94x = 647,320.82
  5. Step 5: Solve for x
    x = 647,320.82/378.94
  6. Step 6: Final answer
    x = 1,708.25

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.