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Finding the Fourth Proportional to 2,800.62, 4,200.39 and 2,255.99

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Solution

The fourth proportional to 2,800.62, 4,200.39 and 2,255.99 is: 3,383.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.62 : 4,200.39 = 2,255.99 : x
  2. Step 2: Convert to fraction form
    2,800.62/4,200.39 = 2,255.99/x
  3. Step 3: Cross multiply
    2,800.62x = 4,200.39 × 2,255.99
  4. Step 4: Simplify right side
    2,800.62x = 9,476,016.83
  5. Step 5: Solve for x
    x = 9,476,016.83/2,800.62
  6. Step 6: Final answer
    x = 3,383.54

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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.