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Finding the Fourth Proportional to 737.96, 1,018.31 and 443.21

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Solution

The fourth proportional to 737.96, 1,018.31 and 443.21 is: 611.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    737.96 : 1,018.31 = 443.21 : x
  2. Step 2: Convert to fraction form
    737.96/1,018.31 = 443.21/x
  3. Step 3: Cross multiply
    737.96x = 1,018.31 × 443.21
  4. Step 4: Simplify right side
    737.96x = 451,317.87
  5. Step 5: Solve for x
    x = 451,317.87/737.96
  6. Step 6: Final answer
    x = 611.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.