Home / 2,771.89-4,155.39-1,129.81

Finding the Fourth Proportional to 2,771.89, 4,155.39 and 1,129.81

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Solution

The fourth proportional to 2,771.89, 4,155.39 and 1,129.81 is: 1,693.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,771.89 : 4,155.39 = 1,129.81 : x
  2. Step 2: Convert to fraction form
    2,771.89/4,155.39 = 1,129.81/x
  3. Step 3: Cross multiply
    2,771.89x = 4,155.39 × 1,129.81
  4. Step 4: Simplify right side
    2,771.89x = 4,694,801.18
  5. Step 5: Solve for x
    x = 4,694,801.18/2,771.89
  6. Step 6: Final answer
    x = 1,693.72

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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.