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Finding the Fourth Proportional to 773.88, 1,067.95 and 442.31

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Solution

The fourth proportional to 773.88, 1,067.95 and 442.31 is: 610.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.88 : 1,067.95 = 442.31 : x
  2. Step 2: Convert to fraction form
    773.88/1,067.95 = 442.31/x
  3. Step 3: Cross multiply
    773.88x = 1,067.95 × 442.31
  4. Step 4: Simplify right side
    773.88x = 472,366.18
  5. Step 5: Solve for x
    x = 472,366.18/773.88
  6. Step 6: Final answer
    x = 610.39

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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.