Home / 2,682.80-4,022.40-1,221.20

Finding the Fourth Proportional to 2,682.80, 4,022.40 and 1,221.20

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Solution

The fourth proportional to 2,682.80, 4,022.40 and 1,221.20 is: 1,830.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,682.80 : 4,022.40 = 1,221.20 : x
  2. Step 2: Convert to fraction form
    2,682.80/4,022.40 = 1,221.20/x
  3. Step 3: Cross multiply
    2,682.80x = 4,022.40 × 1,221.20
  4. Step 4: Simplify right side
    2,682.80x = 4,912,154.88
  5. Step 5: Solve for x
    x = 4,912,154.88/2,682.80
  6. Step 6: Final answer
    x = 1,830.98

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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.