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Finding the Fourth Proportional to 1,442.52, 2,163.51 and 455.20

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Solution

The fourth proportional to 1,442.52, 2,163.51 and 455.20 is: 682.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,442.52 : 2,163.51 = 455.20 : x
  2. Step 2: Convert to fraction form
    1,442.52/2,163.51 = 455.20/x
  3. Step 3: Cross multiply
    1,442.52x = 2,163.51 × 455.20
  4. Step 4: Simplify right side
    1,442.52x = 984,824.34
  5. Step 5: Solve for x
    x = 984,824.34/1,442.52
  6. Step 6: Final answer
    x = 682.71

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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.