Home / 3,105.51-4,659.73-1,257.90

Finding the Fourth Proportional to 3,105.51, 4,659.73 and 1,257.90

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Solution

The fourth proportional to 3,105.51, 4,659.73 and 1,257.90 is: 1,887.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,105.51 : 4,659.73 = 1,257.90 : x
  2. Step 2: Convert to fraction form
    3,105.51/4,659.73 = 1,257.90/x
  3. Step 3: Cross multiply
    3,105.51x = 4,659.73 × 1,257.90
  4. Step 4: Simplify right side
    3,105.51x = 5,861,453.75
  5. Step 5: Solve for x
    x = 5,861,453.75/3,105.51
  6. Step 6: Final answer
    x = 1,887.44

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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.