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Finding the Fourth Proportional to 2,826.93, 4,240.97 and 879.21

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Solution

The fourth proportional to 2,826.93, 4,240.97 and 879.21 is: 1,318.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,826.93 : 4,240.97 = 879.21 : x
  2. Step 2: Convert to fraction form
    2,826.93/4,240.97 = 879.21/x
  3. Step 3: Cross multiply
    2,826.93x = 4,240.97 × 879.21
  4. Step 4: Simplify right side
    2,826.93x = 3,728,698.84
  5. Step 5: Solve for x
    x = 3,728,698.84/2,826.93
  6. Step 6: Final answer
    x = 1,318.99

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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.