Home / 3,131.13-4,697.30-1,399.75

Finding the Fourth Proportional to 3,131.13, 4,697.30 and 1,399.75

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Solution

The fourth proportional to 3,131.13, 4,697.30 and 1,399.75 is: 2,099.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.13 : 4,697.30 = 1,399.75 : x
  2. Step 2: Convert to fraction form
    3,131.13/4,697.30 = 1,399.75/x
  3. Step 3: Cross multiply
    3,131.13x = 4,697.30 × 1,399.75
  4. Step 4: Simplify right side
    3,131.13x = 6,575,045.68
  5. Step 5: Solve for x
    x = 6,575,045.68/3,131.13
  6. Step 6: Final answer
    x = 2,099.90

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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.