Home / 1,998.48-2,759.19-1,290.64

Finding the Fourth Proportional to 1,998.48, 2,759.19 and 1,290.64

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Solution

The fourth proportional to 1,998.48, 2,759.19 and 1,290.64 is: 1,781.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,998.48 : 2,759.19 = 1,290.64 : x
  2. Step 2: Convert to fraction form
    1,998.48/2,759.19 = 1,290.64/x
  3. Step 3: Cross multiply
    1,998.48x = 2,759.19 × 1,290.64
  4. Step 4: Simplify right side
    1,998.48x = 3,561,119.59
  5. Step 5: Solve for x
    x = 3,561,119.59/1,998.48
  6. Step 6: Final answer
    x = 1,781.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.