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Finding the Fourth Proportional to 843.61, 1,265.61 and 295.81

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Solution

The fourth proportional to 843.61, 1,265.61 and 295.81 is: 443.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.61 : 1,265.61 = 295.81 : x
  2. Step 2: Convert to fraction form
    843.61/1,265.61 = 295.81/x
  3. Step 3: Cross multiply
    843.61x = 1,265.61 × 295.81
  4. Step 4: Simplify right side
    843.61x = 374,380.09
  5. Step 5: Solve for x
    x = 374,380.09/843.61
  6. Step 6: Final answer
    x = 443.78

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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.