Home / 2,124.40-3,179.40-1,865.20

Finding the Fourth Proportional to 2,124.40, 3,179.40 and 1,865.20

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Solution

The fourth proportional to 2,124.40, 3,179.40 and 1,865.20 is: 2,791.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,124.40 : 3,179.40 = 1,865.20 : x
  2. Step 2: Convert to fraction form
    2,124.40/3,179.40 = 1,865.20/x
  3. Step 3: Cross multiply
    2,124.40x = 3,179.40 × 1,865.20
  4. Step 4: Simplify right side
    2,124.40x = 5,930,216.88
  5. Step 5: Solve for x
    x = 5,930,216.88/2,124.40
  6. Step 6: Final answer
    x = 2,791.48

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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.