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Finding the Fourth Proportional to 774.28, 1,067.26 and 710.72

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Solution

The fourth proportional to 774.28, 1,067.26 and 710.72 is: 979.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    774.28 : 1,067.26 = 710.72 : x
  2. Step 2: Convert to fraction form
    774.28/1,067.26 = 710.72/x
  3. Step 3: Cross multiply
    774.28x = 1,067.26 × 710.72
  4. Step 4: Simplify right side
    774.28x = 758,523.03
  5. Step 5: Solve for x
    x = 758,523.03/774.28
  6. Step 6: Final answer
    x = 979.65

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1.5x scale

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.