Home / 2,840.70-4,257.11-2,146.80

Finding the Fourth Proportional to 2,840.70, 4,257.11 and 2,146.80

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Solution

The fourth proportional to 2,840.70, 4,257.11 and 2,146.80 is: 3,217.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,840.70 : 4,257.11 = 2,146.80 : x
  2. Step 2: Convert to fraction form
    2,840.70/4,257.11 = 2,146.80/x
  3. Step 3: Cross multiply
    2,840.70x = 4,257.11 × 2,146.80
  4. Step 4: Simplify right side
    2,840.70x = 9,139,163.75
  5. Step 5: Solve for x
    x = 9,139,163.75/2,840.70
  6. Step 6: Final answer
    x = 3,217.22

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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.