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Finding the Fourth Proportional to 3,857.63, 5,786.44 and 1,260.56

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Solution

The fourth proportional to 3,857.63, 5,786.44 and 1,260.56 is: 1,890.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.63 : 5,786.44 = 1,260.56 : x
  2. Step 2: Convert to fraction form
    3,857.63/5,786.44 = 1,260.56/x
  3. Step 3: Cross multiply
    3,857.63x = 5,786.44 × 1,260.56
  4. Step 4: Simplify right side
    3,857.63x = 7,294,166.12
  5. Step 5: Solve for x
    x = 7,294,166.12/3,857.63
  6. Step 6: Final answer
    x = 1,890.84

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Similar ratio
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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.