Home / 2,919.31-4,380.75-1,275.95

Finding the Fourth Proportional to 2,919.31, 4,380.75 and 1,275.95

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Solution

The fourth proportional to 2,919.31, 4,380.75 and 1,275.95 is: 1,914.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,919.31 : 4,380.75 = 1,275.95 : x
  2. Step 2: Convert to fraction form
    2,919.31/4,380.75 = 1,275.95/x
  3. Step 3: Cross multiply
    2,919.31x = 4,380.75 × 1,275.95
  4. Step 4: Simplify right side
    2,919.31x = 5,589,628.91
  5. Step 5: Solve for x
    x = 5,589,628.91/2,919.31
  6. Step 6: Final answer
    x = 1,914.71

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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.