Home / 3,131.62-4,321.51-1,805.56

Finding the Fourth Proportional to 3,131.62, 4,321.51 and 1,805.56

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Solution

The fourth proportional to 3,131.62, 4,321.51 and 1,805.56 is: 2,491.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.62 : 4,321.51 = 1,805.56 : x
  2. Step 2: Convert to fraction form
    3,131.62/4,321.51 = 1,805.56/x
  3. Step 3: Cross multiply
    3,131.62x = 4,321.51 × 1,805.56
  4. Step 4: Simplify right side
    3,131.62x = 7,802,745.60
  5. Step 5: Solve for x
    x = 7,802,745.60/3,131.62
  6. Step 6: Final answer
    x = 2,491.60

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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.