Home / 2,679.66-4,014.39-1,288.89

Finding the Fourth Proportional to 2,679.66, 4,014.39 and 1,288.89

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Solution

The fourth proportional to 2,679.66, 4,014.39 and 1,288.89 is: 1,930.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,679.66 : 4,014.39 = 1,288.89 : x
  2. Step 2: Convert to fraction form
    2,679.66/4,014.39 = 1,288.89/x
  3. Step 3: Cross multiply
    2,679.66x = 4,014.39 × 1,288.89
  4. Step 4: Simplify right side
    2,679.66x = 5,174,107.13
  5. Step 5: Solve for x
    x = 5,174,107.13/2,679.66
  6. Step 6: Final answer
    x = 1,930.88

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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.