Home / 2,790.20-4,177.20-2,644.40

Finding the Fourth Proportional to 2,790.20, 4,177.20 and 2,644.40

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Solution

The fourth proportional to 2,790.20, 4,177.20 and 2,644.40 is: 3,958.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.20 : 4,177.20 = 2,644.40 : x
  2. Step 2: Convert to fraction form
    2,790.20/4,177.20 = 2,644.40/x
  3. Step 3: Cross multiply
    2,790.20x = 4,177.20 × 2,644.40
  4. Step 4: Simplify right side
    2,790.20x = 11,046,187.68
  5. Step 5: Solve for x
    x = 11,046,187.68/2,790.20
  6. Step 6: Final answer
    x = 3,958.92

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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.