Home / 3,380.40-5,065.20-2,829.60

Finding the Fourth Proportional to 3,380.40, 5,065.20 and 2,829.60

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Solution

The fourth proportional to 3,380.40, 5,065.20 and 2,829.60 is: 4,239.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,380.40 : 5,065.20 = 2,829.60 : x
  2. Step 2: Convert to fraction form
    3,380.40/5,065.20 = 2,829.60/x
  3. Step 3: Cross multiply
    3,380.40x = 5,065.20 × 2,829.60
  4. Step 4: Simplify right side
    3,380.40x = 14,332,489.92
  5. Step 5: Solve for x
    x = 14,332,489.92/3,380.40
  6. Step 6: Final answer
    x = 4,239.88

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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.