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Finding the Fourth Proportional to 843.38, 1,265.07 and 392.54

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Solution

The fourth proportional to 843.38, 1,265.07 and 392.54 is: 588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.38 : 1,265.07 = 392.54 : x
  2. Step 2: Convert to fraction form
    843.38/1,265.07 = 392.54/x
  3. Step 3: Cross multiply
    843.38x = 1,265.07 × 392.54
  4. Step 4: Simplify right side
    843.38x = 496,584.25
  5. Step 5: Solve for x
    x = 496,584.25/843.38
  6. Step 6: Final answer
    x = 588.80

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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.