Home / 3,431.56-5,147.28-1,123

Finding the Fourth Proportional to 3,431.56, 5,147.28 and 1,123

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Solution

The fourth proportional to 3,431.56, 5,147.28 and 1,123 is: 1,684.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.56 : 5,147.28 = 1,123 : x
  2. Step 2: Convert to fraction form
    3,431.56/5,147.28 = 1,123/x
  3. Step 3: Cross multiply
    3,431.56x = 5,147.28 × 1,123
  4. Step 4: Simplify right side
    3,431.56x = 5,780,395.44
  5. Step 5: Solve for x
    x = 5,780,395.44/3,431.56
  6. Step 6: Final answer
    x = 1,684.48

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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.