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Finding the Fourth Proportional to 2,719.87, 4,079.99 and 845.50

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Solution

The fourth proportional to 2,719.87, 4,079.99 and 845.50 is: 1,268.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,719.87 : 4,079.99 = 845.50 : x
  2. Step 2: Convert to fraction form
    2,719.87/4,079.99 = 845.50/x
  3. Step 3: Cross multiply
    2,719.87x = 4,079.99 × 845.50
  4. Step 4: Simplify right side
    2,719.87x = 3,449,627.32
  5. Step 5: Solve for x
    x = 3,449,627.32/2,719.87
  6. Step 6: Final answer
    x = 1,268.31

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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.