Home / 3,129.40-4,694.10-1,399.48

Finding the Fourth Proportional to 3,129.40, 4,694.10 and 1,399.48

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Solution

The fourth proportional to 3,129.40, 4,694.10 and 1,399.48 is: 2,099.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.40 : 4,694.10 = 1,399.48 : x
  2. Step 2: Convert to fraction form
    3,129.40/4,694.10 = 1,399.48/x
  3. Step 3: Cross multiply
    3,129.40x = 4,694.10 × 1,399.48
  4. Step 4: Simplify right side
    3,129.40x = 6,569,299.07
  5. Step 5: Solve for x
    x = 6,569,299.07/3,129.40
  6. Step 6: Final answer
    x = 2,099.22

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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.