Home / 1,268.15-1,900.57-516.78

Finding the Fourth Proportional to 1,268.15, 1,900.57 and 516.78

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Solution

The fourth proportional to 1,268.15, 1,900.57 and 516.78 is: 774.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.15 : 1,900.57 = 516.78 : x
  2. Step 2: Convert to fraction form
    1,268.15/1,900.57 = 516.78/x
  3. Step 3: Cross multiply
    1,268.15x = 1,900.57 × 516.78
  4. Step 4: Simplify right side
    1,268.15x = 982,170.90
  5. Step 5: Solve for x
    x = 982,170.90/1,268.15
  6. Step 6: Final answer
    x = 774.49

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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.