Home / 1,976.25-2,959.11-1,280.91

Finding the Fourth Proportional to 1,976.25, 2,959.11 and 1,280.91

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Solution

The fourth proportional to 1,976.25, 2,959.11 and 1,280.91 is: 1,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,976.25 : 2,959.11 = 1,280.91 : x
  2. Step 2: Convert to fraction form
    1,976.25/2,959.11 = 1,280.91/x
  3. Step 3: Cross multiply
    1,976.25x = 2,959.11 × 1,280.91
  4. Step 4: Simplify right side
    1,976.25x = 3,790,353.59
  5. Step 5: Solve for x
    x = 3,790,353.59/1,976.25
  6. Step 6: Final answer
    x = 1,917.95

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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.