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Finding the Fourth Proportional to 774.76, 1,067.94 and 759.40

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Solution

The fourth proportional to 774.76, 1,067.94 and 759.40 is: 1,046.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.76 : 1,067.94 = 759.40 : x
  2. Step 2: Convert to fraction form
    774.76/1,067.94 = 759.40/x
  3. Step 3: Cross multiply
    774.76x = 1,067.94 × 759.40
  4. Step 4: Simplify right side
    774.76x = 810,993.64
  5. Step 5: Solve for x
    x = 810,993.64/774.76
  6. Step 6: Final answer
    x = 1,046.77

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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.