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Finding the Fourth Proportional to 3,857.64, 5,786.46 and 935.94

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Solution

The fourth proportional to 3,857.64, 5,786.46 and 935.94 is: 1,403.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,857.64 : 5,786.46 = 935.94 : x
  2. Step 2: Convert to fraction form
    3,857.64/5,786.46 = 935.94/x
  3. Step 3: Cross multiply
    3,857.64x = 5,786.46 × 935.94
  4. Step 4: Simplify right side
    3,857.64x = 5,415,779.37
  5. Step 5: Solve for x
    x = 5,415,779.37/3,857.64
  6. Step 6: Final answer
    x = 1,403.91

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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.