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Finding the Fourth Proportional to 3,836.68, 5,755.74 and 1,238.92

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Solution

The fourth proportional to 3,836.68, 5,755.74 and 1,238.92 is: 1,858.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,836.68 : 5,755.74 = 1,238.92 : x
  2. Step 2: Convert to fraction form
    3,836.68/5,755.74 = 1,238.92/x
  3. Step 3: Cross multiply
    3,836.68x = 5,755.74 × 1,238.92
  4. Step 4: Simplify right side
    3,836.68x = 7,130,901.40
  5. Step 5: Solve for x
    x = 7,130,901.40/3,836.68
  6. Step 6: Final answer
    x = 1,858.61

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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.