Home / 2,206.90-3,311.12-1,384.20

Finding the Fourth Proportional to 2,206.90, 3,311.12 and 1,384.20

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Solution

The fourth proportional to 2,206.90, 3,311.12 and 1,384.20 is: 2,076.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,206.90 : 3,311.12 = 1,384.20 : x
  2. Step 2: Convert to fraction form
    2,206.90/3,311.12 = 1,384.20/x
  3. Step 3: Cross multiply
    2,206.90x = 3,311.12 × 1,384.20
  4. Step 4: Simplify right side
    2,206.90x = 4,583,252.30
  5. Step 5: Solve for x
    x = 4,583,252.30/2,206.90
  6. Step 6: Final answer
    x = 2,076.78

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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.