Home / 3,131.28-4,696.92-1,399.68

Finding the Fourth Proportional to 3,131.28, 4,696.92 and 1,399.68

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Solution

The fourth proportional to 3,131.28, 4,696.92 and 1,399.68 is: 2,099.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.28 : 4,696.92 = 1,399.68 : x
  2. Step 2: Convert to fraction form
    3,131.28/4,696.92 = 1,399.68/x
  3. Step 3: Cross multiply
    3,131.28x = 4,696.92 × 1,399.68
  4. Step 4: Simplify right side
    3,131.28x = 6,574,184.99
  5. Step 5: Solve for x
    x = 6,574,184.99/3,131.28
  6. Step 6: Final answer
    x = 2,099.52

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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.