Home / 1,268.68-1,739.60-1,143.84

Finding the Fourth Proportional to 1,268.68, 1,739.60 and 1,143.84

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Solution

The fourth proportional to 1,268.68, 1,739.60 and 1,143.84 is: 1,568.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.68 : 1,739.60 = 1,143.84 : x
  2. Step 2: Convert to fraction form
    1,268.68/1,739.60 = 1,143.84/x
  3. Step 3: Cross multiply
    1,268.68x = 1,739.60 × 1,143.84
  4. Step 4: Simplify right side
    1,268.68x = 1,989,824.06
  5. Step 5: Solve for x
    x = 1,989,824.06/1,268.68
  6. Step 6: Final answer
    x = 1,568.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.