Home / 2,921.22-4,380.20-1,187.82

Finding the Fourth Proportional to 2,921.22, 4,380.20 and 1,187.82

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Solution

The fourth proportional to 2,921.22, 4,380.20 and 1,187.82 is: 1,781.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.22 : 4,380.20 = 1,187.82 : x
  2. Step 2: Convert to fraction form
    2,921.22/4,380.20 = 1,187.82/x
  3. Step 3: Cross multiply
    2,921.22x = 4,380.20 × 1,187.82
  4. Step 4: Simplify right side
    2,921.22x = 5,202,889.16
  5. Step 5: Solve for x
    x = 5,202,889.16/2,921.22
  6. Step 6: Final answer
    x = 1,781.07

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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.