Home / 2,789.28-4,185.36-1,490.64

Finding the Fourth Proportional to 2,789.28, 4,185.36 and 1,490.64

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Solution

The fourth proportional to 2,789.28, 4,185.36 and 1,490.64 is: 2,236.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,789.28 : 4,185.36 = 1,490.64 : x
  2. Step 2: Convert to fraction form
    2,789.28/4,185.36 = 1,490.64/x
  3. Step 3: Cross multiply
    2,789.28x = 4,185.36 × 1,490.64
  4. Step 4: Simplify right side
    2,789.28x = 6,238,865.03
  5. Step 5: Solve for x
    x = 6,238,865.03/2,789.28
  6. Step 6: Final answer
    x = 2,236.73

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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.