Home / 2,092.40-3,139.60-1,399.40

Finding the Fourth Proportional to 2,092.40, 3,139.60 and 1,399.40

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Solution

The fourth proportional to 2,092.40, 3,139.60 and 1,399.40 is: 2,099.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.40 : 3,139.60 = 1,399.40 : x
  2. Step 2: Convert to fraction form
    2,092.40/3,139.60 = 1,399.40/x
  3. Step 3: Cross multiply
    2,092.40x = 3,139.60 × 1,399.40
  4. Step 4: Simplify right side
    2,092.40x = 4,393,556.24
  5. Step 5: Solve for x
    x = 4,393,556.24/2,092.40
  6. Step 6: Final answer
    x = 2,099.77

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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.