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Finding the Fourth Proportional to 712.26, 1,067.94 and 438.48

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Solution

The fourth proportional to 712.26, 1,067.94 and 438.48 is: 657.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.26 : 1,067.94 = 438.48 : x
  2. Step 2: Convert to fraction form
    712.26/1,067.94 = 438.48/x
  3. Step 3: Cross multiply
    712.26x = 1,067.94 × 438.48
  4. Step 4: Simplify right side
    712.26x = 468,270.33
  5. Step 5: Solve for x
    x = 468,270.33/712.26
  6. Step 6: Final answer
    x = 657.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.