Home / 1,268.68-1,900.83-1,140.28

Finding the Fourth Proportional to 1,268.68, 1,900.83 and 1,140.28

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Solution

The fourth proportional to 1,268.68, 1,900.83 and 1,140.28 is: 1,708.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.68 : 1,900.83 = 1,140.28 : x
  2. Step 2: Convert to fraction form
    1,268.68/1,900.83 = 1,140.28/x
  3. Step 3: Cross multiply
    1,268.68x = 1,900.83 × 1,140.28
  4. Step 4: Simplify right side
    1,268.68x = 2,167,477.96
  5. Step 5: Solve for x
    x = 2,167,477.96/1,268.68
  6. Step 6: Final answer
    x = 1,708.45

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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.