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Finding the Fourth Proportional to 2,819.95, 3,891.51 and 1,577.95

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Solution

The fourth proportional to 2,819.95, 3,891.51 and 1,577.95 is: 2,177.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.95 : 3,891.51 = 1,577.95 : x
  2. Step 2: Convert to fraction form
    2,819.95/3,891.51 = 1,577.95/x
  3. Step 3: Cross multiply
    2,819.95x = 3,891.51 × 1,577.95
  4. Step 4: Simplify right side
    2,819.95x = 6,140,608.20
  5. Step 5: Solve for x
    x = 6,140,608.20/2,819.95
  6. Step 6: Final answer
    x = 2,177.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.