Home / 3,918.38-5,878.44-1,321.26

Finding the Fourth Proportional to 3,918.38, 5,878.44 and 1,321.26

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Solution

The fourth proportional to 3,918.38, 5,878.44 and 1,321.26 is: 1,982.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.38 : 5,878.44 = 1,321.26 : x
  2. Step 2: Convert to fraction form
    3,918.38/5,878.44 = 1,321.26/x
  3. Step 3: Cross multiply
    3,918.38x = 5,878.44 × 1,321.26
  4. Step 4: Simplify right side
    3,918.38x = 7,766,947.63
  5. Step 5: Solve for x
    x = 7,766,947.63/3,918.38
  6. Step 6: Final answer
    x = 1,982.18

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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.