Home / 1,268.73-1,891.17-1,129.19

Finding the Fourth Proportional to 1,268.73, 1,891.17 and 1,129.19

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Solution

The fourth proportional to 1,268.73, 1,891.17 and 1,129.19 is: 1,683.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.73 : 1,891.17 = 1,129.19 : x
  2. Step 2: Convert to fraction form
    1,268.73/1,891.17 = 1,129.19/x
  3. Step 3: Cross multiply
    1,268.73x = 1,891.17 × 1,129.19
  4. Step 4: Simplify right side
    1,268.73x = 2,135,480.80
  5. Step 5: Solve for x
    x = 2,135,480.80/1,268.73
  6. Step 6: Final answer
    x = 1,683.16

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.