Home / 1,989.44-2,745.12-1,369.28

Finding the Fourth Proportional to 1,989.44, 2,745.12 and 1,369.28

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Solution

The fourth proportional to 1,989.44, 2,745.12 and 1,369.28 is: 1,889.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.44 : 2,745.12 = 1,369.28 : x
  2. Step 2: Convert to fraction form
    1,989.44/2,745.12 = 1,369.28/x
  3. Step 3: Cross multiply
    1,989.44x = 2,745.12 × 1,369.28
  4. Step 4: Simplify right side
    1,989.44x = 3,758,837.91
  5. Step 5: Solve for x
    x = 3,758,837.91/1,989.44
  6. Step 6: Final answer
    x = 1,889.39

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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.