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Finding the Fourth Proportional to 1,908.68, 2,863.41 and 659.37

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Solution

The fourth proportional to 1,908.68, 2,863.41 and 659.37 is: 989.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.68 : 2,863.41 = 659.37 : x
  2. Step 2: Convert to fraction form
    1,908.68/2,863.41 = 659.37/x
  3. Step 3: Cross multiply
    1,908.68x = 2,863.41 × 659.37
  4. Step 4: Simplify right side
    1,908.68x = 1,888,046.65
  5. Step 5: Solve for x
    x = 1,888,046.65/1,908.68
  6. Step 6: Final answer
    x = 989.19

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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.