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Finding the Fourth Proportional to 2,619.14, 3,926.83 and 863.16

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Solution

The fourth proportional to 2,619.14, 3,926.83 and 863.16 is: 1,294.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,619.14 : 3,926.83 = 863.16 : x
  2. Step 2: Convert to fraction form
    2,619.14/3,926.83 = 863.16/x
  3. Step 3: Cross multiply
    2,619.14x = 3,926.83 × 863.16
  4. Step 4: Simplify right side
    2,619.14x = 3,389,500.45
  5. Step 5: Solve for x
    x = 3,389,500.45/2,619.14
  6. Step 6: Final answer
    x = 1,294.13

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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.