Home / 3,286.60-4,929.90-2,120.20

Finding the Fourth Proportional to 3,286.60, 4,929.90 and 2,120.20

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Solution

The fourth proportional to 3,286.60, 4,929.90 and 2,120.20 is: 3,180.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,286.60 : 4,929.90 = 2,120.20 : x
  2. Step 2: Convert to fraction form
    3,286.60/4,929.90 = 2,120.20/x
  3. Step 3: Cross multiply
    3,286.60x = 4,929.90 × 2,120.20
  4. Step 4: Simplify right side
    3,286.60x = 10,452,373.98
  5. Step 5: Solve for x
    x = 10,452,373.98/3,286.60
  6. Step 6: Final answer
    x = 3,180.30

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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.