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Finding the Fourth Proportional to 843.93, 1,265.66 and 323.90

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Solution

The fourth proportional to 843.93, 1,265.66 and 323.90 is: 485.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.93 : 1,265.66 = 323.90 : x
  2. Step 2: Convert to fraction form
    843.93/1,265.66 = 323.90/x
  3. Step 3: Cross multiply
    843.93x = 1,265.66 × 323.90
  4. Step 4: Simplify right side
    843.93x = 409,939.33
  5. Step 5: Solve for x
    x = 409,939.33/843.93
  6. Step 6: Final answer
    x = 485.75

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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.