Home / 2,161.24-2,982.34-1,216.89

Finding the Fourth Proportional to 2,161.24, 2,982.34 and 1,216.89

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Solution

The fourth proportional to 2,161.24, 2,982.34 and 1,216.89 is: 1,679.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.24 : 2,982.34 = 1,216.89 : x
  2. Step 2: Convert to fraction form
    2,161.24/2,982.34 = 1,216.89/x
  3. Step 3: Cross multiply
    2,161.24x = 2,982.34 × 1,216.89
  4. Step 4: Simplify right side
    2,161.24x = 3,629,179.72
  5. Step 5: Solve for x
    x = 3,629,179.72/2,161.24
  6. Step 6: Final answer
    x = 1,679.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.