Home / 2,139.92-3,209.27-1,358.75

Finding the Fourth Proportional to 2,139.92, 3,209.27 and 1,358.75

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Solution

The fourth proportional to 2,139.92, 3,209.27 and 1,358.75 is: 2,037.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.92 : 3,209.27 = 1,358.75 : x
  2. Step 2: Convert to fraction form
    2,139.92/3,209.27 = 1,358.75/x
  3. Step 3: Cross multiply
    2,139.92x = 3,209.27 × 1,358.75
  4. Step 4: Simplify right side
    2,139.92x = 4,360,582.96
  5. Step 5: Solve for x
    x = 4,360,582.96/2,139.92
  6. Step 6: Final answer
    x = 2,037.73

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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.