Home / 3,420.37-5,131.26-1,080.99

Finding the Fourth Proportional to 3,420.37, 5,131.26 and 1,080.99

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Solution

The fourth proportional to 3,420.37, 5,131.26 and 1,080.99 is: 1,621.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,420.37 : 5,131.26 = 1,080.99 : x
  2. Step 2: Convert to fraction form
    3,420.37/5,131.26 = 1,080.99/x
  3. Step 3: Cross multiply
    3,420.37x = 5,131.26 × 1,080.99
  4. Step 4: Simplify right side
    3,420.37x = 5,546,840.75
  5. Step 5: Solve for x
    x = 5,546,840.75/3,420.37
  6. Step 6: Final answer
    x = 1,621.71

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Double scale
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1.5x scale

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.