Home / 2,826.78-4,238.97-1,420.26

Finding the Fourth Proportional to 2,826.78, 4,238.97 and 1,420.26

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Solution

The fourth proportional to 2,826.78, 4,238.97 and 1,420.26 is: 2,129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826.78 : 4,238.97 = 1,420.26 : x
  2. Step 2: Convert to fraction form
    2,826.78/4,238.97 = 1,420.26/x
  3. Step 3: Cross multiply
    2,826.78x = 4,238.97 × 1,420.26
  4. Step 4: Simplify right side
    2,826.78x = 6,020,439.53
  5. Step 5: Solve for x
    x = 6,020,439.53/2,826.78
  6. Step 6: Final answer
    x = 2,129.79

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1.5x scale

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.