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Finding the Fourth Proportional to 2,786.41, 4,179.68 and 838.63

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Solution

The fourth proportional to 2,786.41, 4,179.68 and 838.63 is: 1,257.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,786.41 : 4,179.68 = 838.63 : x
  2. Step 2: Convert to fraction form
    2,786.41/4,179.68 = 838.63/x
  3. Step 3: Cross multiply
    2,786.41x = 4,179.68 × 838.63
  4. Step 4: Simplify right side
    2,786.41x = 3,505,179.95
  5. Step 5: Solve for x
    x = 3,505,179.95/2,786.41
  6. Step 6: Final answer
    x = 1,257.96

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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.