Home / 2,629.26-3,936.60-1,978.02

Finding the Fourth Proportional to 2,629.26, 3,936.60 and 1,978.02

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Solution

The fourth proportional to 2,629.26, 3,936.60 and 1,978.02 is: 2,961.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.26 : 3,936.60 = 1,978.02 : x
  2. Step 2: Convert to fraction form
    2,629.26/3,936.60 = 1,978.02/x
  3. Step 3: Cross multiply
    2,629.26x = 3,936.60 × 1,978.02
  4. Step 4: Simplify right side
    2,629.26x = 7,786,673.53
  5. Step 5: Solve for x
    x = 7,786,673.53/2,629.26
  6. Step 6: Final answer
    x = 2,961.55

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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.