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Finding the Fourth Proportional to 773.25, 1,067.31 and 478.37

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Solution

The fourth proportional to 773.25, 1,067.31 and 478.37 is: 660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.25 : 1,067.31 = 478.37 : x
  2. Step 2: Convert to fraction form
    773.25/1,067.31 = 478.37/x
  3. Step 3: Cross multiply
    773.25x = 1,067.31 × 478.37
  4. Step 4: Simplify right side
    773.25x = 510,571.75
  5. Step 5: Solve for x
    x = 510,571.75/773.25
  6. Step 6: Final answer
    x = 660.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.