Home / 2,781.78-4,171.96-1,138.02

Finding the Fourth Proportional to 2,781.78, 4,171.96 and 1,138.02

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Solution

The fourth proportional to 2,781.78, 4,171.96 and 1,138.02 is: 1,706.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.78 : 4,171.96 = 1,138.02 : x
  2. Step 2: Convert to fraction form
    2,781.78/4,171.96 = 1,138.02/x
  3. Step 3: Cross multiply
    2,781.78x = 4,171.96 × 1,138.02
  4. Step 4: Simplify right side
    2,781.78x = 4,747,773.92
  5. Step 5: Solve for x
    x = 4,747,773.92/2,781.78
  6. Step 6: Final answer
    x = 1,706.74

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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.