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Finding the Fourth Proportional to 936.44, 1,291.86 and 739.64

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Solution

The fourth proportional to 936.44, 1,291.86 and 739.64 is: 1,020.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.44 : 1,291.86 = 739.64 : x
  2. Step 2: Convert to fraction form
    936.44/1,291.86 = 739.64/x
  3. Step 3: Cross multiply
    936.44x = 1,291.86 × 739.64
  4. Step 4: Simplify right side
    936.44x = 955,511.33
  5. Step 5: Solve for x
    x = 955,511.33/936.44
  6. Step 6: Final answer
    x = 1,020.37

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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.