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Finding the Fourth Proportional to 773.80, 1,067.90 and 442.28

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Solution

The fourth proportional to 773.80, 1,067.90 and 442.28 is: 610.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.80 : 1,067.90 = 442.28 : x
  2. Step 2: Convert to fraction form
    773.80/1,067.90 = 442.28/x
  3. Step 3: Cross multiply
    773.80x = 1,067.90 × 442.28
  4. Step 4: Simplify right side
    773.80x = 472,303.26
  5. Step 5: Solve for x
    x = 472,303.26/773.80
  6. Step 6: Final answer
    x = 610.37

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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.