Home / 1,355.72-2,028.66-1,122.44

Finding the Fourth Proportional to 1,355.72, 2,028.66 and 1,122.44

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Solution

The fourth proportional to 1,355.72, 2,028.66 and 1,122.44 is: 1,679.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.72 : 2,028.66 = 1,122.44 : x
  2. Step 2: Convert to fraction form
    1,355.72/2,028.66 = 1,122.44/x
  3. Step 3: Cross multiply
    1,355.72x = 2,028.66 × 1,122.44
  4. Step 4: Simplify right side
    1,355.72x = 2,277,049.13
  5. Step 5: Solve for x
    x = 2,277,049.13/1,355.72
  6. Step 6: Final answer
    x = 1,679.59

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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.