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Finding the Fourth Proportional to 1,455.57, 2,183.56 and 481.55

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Solution

The fourth proportional to 1,455.57, 2,183.56 and 481.55 is: 722.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.57 : 2,183.56 = 481.55 : x
  2. Step 2: Convert to fraction form
    1,455.57/2,183.56 = 481.55/x
  3. Step 3: Cross multiply
    1,455.57x = 2,183.56 × 481.55
  4. Step 4: Simplify right side
    1,455.57x = 1,051,481.20
  5. Step 5: Solve for x
    x = 1,051,481.20/1,455.57
  6. Step 6: Final answer
    x = 722.38

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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.