Home / 2,639.24-3,961.26-1,407.70

Finding the Fourth Proportional to 2,639.24, 3,961.26 and 1,407.70

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Solution

The fourth proportional to 2,639.24, 3,961.26 and 1,407.70 is: 2,112.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.24 : 3,961.26 = 1,407.70 : x
  2. Step 2: Convert to fraction form
    2,639.24/3,961.26 = 1,407.70/x
  3. Step 3: Cross multiply
    2,639.24x = 3,961.26 × 1,407.70
  4. Step 4: Simplify right side
    2,639.24x = 5,576,265.70
  5. Step 5: Solve for x
    x = 5,576,265.70/2,639.24
  6. Step 6: Final answer
    x = 2,112.83

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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.