Home / 3,421.08-5,131.26-1,080.54

Finding the Fourth Proportional to 3,421.08, 5,131.26 and 1,080.54

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Solution

The fourth proportional to 3,421.08, 5,131.26 and 1,080.54 is: 1,620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.08 : 5,131.26 = 1,080.54 : x
  2. Step 2: Convert to fraction form
    3,421.08/5,131.26 = 1,080.54/x
  3. Step 3: Cross multiply
    3,421.08x = 5,131.26 × 1,080.54
  4. Step 4: Simplify right side
    3,421.08x = 5,544,531.68
  5. Step 5: Solve for x
    x = 5,544,531.68/3,421.08
  6. Step 6: Final answer
    x = 1,620.70

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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.