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Finding the Fourth Proportional to 2,786.26, 4,179.75 and 838.66

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Solution

The fourth proportional to 2,786.26, 4,179.75 and 838.66 is: 1,258.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.26 : 4,179.75 = 838.66 : x
  2. Step 2: Convert to fraction form
    2,786.26/4,179.75 = 838.66/x
  3. Step 3: Cross multiply
    2,786.26x = 4,179.75 × 838.66
  4. Step 4: Simplify right side
    2,786.26x = 3,505,389.14
  5. Step 5: Solve for x
    x = 3,505,389.14/2,786.26
  6. Step 6: Final answer
    x = 1,258.10

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1.5x scale

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.