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Finding the Fourth Proportional to 578.26, 866.41 and 285.37

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Solution

The fourth proportional to 578.26, 866.41 and 285.37 is: 427.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.26 : 866.41 = 285.37 : x
  2. Step 2: Convert to fraction form
    578.26/866.41 = 285.37/x
  3. Step 3: Cross multiply
    578.26x = 866.41 × 285.37
  4. Step 4: Simplify right side
    578.26x = 247,243.09
  5. Step 5: Solve for x
    x = 247,243.09/578.26
  6. Step 6: Final answer
    x = 427.56

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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.