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Finding the Fourth Proportional to 1,441.26, 2,163.22 and 661.68

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Solution

The fourth proportional to 1,441.26, 2,163.22 and 661.68 is: 993.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.26 : 2,163.22 = 661.68 : x
  2. Step 2: Convert to fraction form
    1,441.26/2,163.22 = 661.68/x
  3. Step 3: Cross multiply
    1,441.26x = 2,163.22 × 661.68
  4. Step 4: Simplify right side
    1,441.26x = 1,431,359.41
  5. Step 5: Solve for x
    x = 1,431,359.41/1,441.26
  6. Step 6: Final answer
    x = 993.13

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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.