Home / 1,984.68-2,739.78-1,286.28

Finding the Fourth Proportional to 1,984.68, 2,739.78 and 1,286.28

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Solution

The fourth proportional to 1,984.68, 2,739.78 and 1,286.28 is: 1,775.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,984.68 : 2,739.78 = 1,286.28 : x
  2. Step 2: Convert to fraction form
    1,984.68/2,739.78 = 1,286.28/x
  3. Step 3: Cross multiply
    1,984.68x = 2,739.78 × 1,286.28
  4. Step 4: Simplify right side
    1,984.68x = 3,524,124.22
  5. Step 5: Solve for x
    x = 3,524,124.22/1,984.68
  6. Step 6: Final answer
    x = 1,775.66

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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.