Home / 2,790.70-4,182.45-2,138.20

Finding the Fourth Proportional to 2,790.70, 4,182.45 and 2,138.20

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Solution

The fourth proportional to 2,790.70, 4,182.45 and 2,138.20 is: 3,204.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.70 : 4,182.45 = 2,138.20 : x
  2. Step 2: Convert to fraction form
    2,790.70/4,182.45 = 2,138.20/x
  3. Step 3: Cross multiply
    2,790.70x = 4,182.45 × 2,138.20
  4. Step 4: Simplify right side
    2,790.70x = 8,942,914.59
  5. Step 5: Solve for x
    x = 8,942,914.59/2,790.70
  6. Step 6: Final answer
    x = 3,204.54

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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.