Home / 2,763.96-4,147.38-1,121.72

Finding the Fourth Proportional to 2,763.96, 4,147.38 and 1,121.72

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Solution

The fourth proportional to 2,763.96, 4,147.38 and 1,121.72 is: 1,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,763.96 : 4,147.38 = 1,121.72 : x
  2. Step 2: Convert to fraction form
    2,763.96/4,147.38 = 1,121.72/x
  3. Step 3: Cross multiply
    2,763.96x = 4,147.38 × 1,121.72
  4. Step 4: Simplify right side
    2,763.96x = 4,652,199.09
  5. Step 5: Solve for x
    x = 4,652,199.09/2,763.96
  6. Step 6: Final answer
    x = 1,683.16

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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.