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Finding the Fourth Proportional to 2,790.95, 4,188.03 and 1,251.95

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Solution

The fourth proportional to 2,790.95, 4,188.03 and 1,251.95 is: 1,878.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.95 : 4,188.03 = 1,251.95 : x
  2. Step 2: Convert to fraction form
    2,790.95/4,188.03 = 1,251.95/x
  3. Step 3: Cross multiply
    2,790.95x = 4,188.03 × 1,251.95
  4. Step 4: Simplify right side
    2,790.95x = 5,243,183.22
  5. Step 5: Solve for x
    x = 5,243,183.22/2,790.95
  6. Step 6: Final answer
    x = 1,878.64

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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.