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Finding the Fourth Proportional to 386.26, 578.46 and 223.44

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Solution

The fourth proportional to 386.26, 578.46 and 223.44 is: 334.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.26 : 578.46 = 223.44 : x
  2. Step 2: Convert to fraction form
    386.26/578.46 = 223.44/x
  3. Step 3: Cross multiply
    386.26x = 578.46 × 223.44
  4. Step 4: Simplify right side
    386.26x = 129,251.10
  5. Step 5: Solve for x
    x = 129,251.10/386.26
  6. Step 6: Final answer
    x = 334.62

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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.