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Finding the Fourth Proportional to 5,555.60, 8,335.80 and 2,819.60

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Solution

The fourth proportional to 5,555.60, 8,335.80 and 2,819.60 is: 4,230.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,555.60 : 8,335.80 = 2,819.60 : x
  2. Step 2: Convert to fraction form
    5,555.60/8,335.80 = 2,819.60/x
  3. Step 3: Cross multiply
    5,555.60x = 8,335.80 × 2,819.60
  4. Step 4: Simplify right side
    5,555.60x = 23,503,621.68
  5. Step 5: Solve for x
    x = 23,503,621.68/5,555.60
  6. Step 6: Final answer
    x = 4,230.62

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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.