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Finding the Fourth Proportional to 389.35, 537.26 and 223.55

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Solution

The fourth proportional to 389.35, 537.26 and 223.55 is: 308.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.35 : 537.26 = 223.55 : x
  2. Step 2: Convert to fraction form
    389.35/537.26 = 223.55/x
  3. Step 3: Cross multiply
    389.35x = 537.26 × 223.55
  4. Step 4: Simplify right side
    389.35x = 120,104.47
  5. Step 5: Solve for x
    x = 120,104.47/389.35
  6. Step 6: Final answer
    x = 308.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.