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Finding the Fourth Proportional to 3,455.51, 5,183.24 and 858.44

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Solution

The fourth proportional to 3,455.51, 5,183.24 and 858.44 is: 1,287.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.51 : 5,183.24 = 858.44 : x
  2. Step 2: Convert to fraction form
    3,455.51/5,183.24 = 858.44/x
  3. Step 3: Cross multiply
    3,455.51x = 5,183.24 × 858.44
  4. Step 4: Simplify right side
    3,455.51x = 4,449,496.25
  5. Step 5: Solve for x
    x = 4,449,496.25/3,455.51
  6. Step 6: Final answer
    x = 1,287.65

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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.