Home / 3,940.48-5,431.20-2,759.44

Finding the Fourth Proportional to 3,940.48, 5,431.20 and 2,759.44

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Solution

The fourth proportional to 3,940.48, 5,431.20 and 2,759.44 is: 3,803.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.48 : 5,431.20 = 2,759.44 : x
  2. Step 2: Convert to fraction form
    3,940.48/5,431.20 = 2,759.44/x
  3. Step 3: Cross multiply
    3,940.48x = 5,431.20 × 2,759.44
  4. Step 4: Simplify right side
    3,940.48x = 14,987,070.53
  5. Step 5: Solve for x
    x = 14,987,070.53/3,940.48
  6. Step 6: Final answer
    x = 3,803.36

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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.