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Finding the Fourth Proportional to 2,819.63, 4,220.79 and 2,540.79

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Solution

The fourth proportional to 2,819.63, 4,220.79 and 2,540.79 is: 3,803.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.63 : 4,220.79 = 2,540.79 : x
  2. Step 2: Convert to fraction form
    2,819.63/4,220.79 = 2,540.79/x
  3. Step 3: Cross multiply
    2,819.63x = 4,220.79 × 2,540.79
  4. Step 4: Simplify right side
    2,819.63x = 10,724,131.50
  5. Step 5: Solve for x
    x = 10,724,131.50/2,819.63
  6. Step 6: Final answer
    x = 3,803.38

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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.