Home / 2,215.92-3,058-1,221.32

Finding the Fourth Proportional to 2,215.92, 3,058 and 1,221.32

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Solution

The fourth proportional to 2,215.92, 3,058 and 1,221.32 is: 1,685.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.92 : 3,058 = 1,221.32 : x
  2. Step 2: Convert to fraction form
    2,215.92/3,058 = 1,221.32/x
  3. Step 3: Cross multiply
    2,215.92x = 3,058 × 1,221.32
  4. Step 4: Simplify right side
    2,215.92x = 3,734,796.56
  5. Step 5: Solve for x
    x = 3,734,796.56/2,215.92
  6. Step 6: Final answer
    x = 1,685.44

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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.