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Finding the Fourth Proportional to 389.22, 537 and 223.44

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Solution

The fourth proportional to 389.22, 537 and 223.44 is: 308.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.22 : 537 = 223.44 : x
  2. Step 2: Convert to fraction form
    389.22/537 = 223.44/x
  3. Step 3: Cross multiply
    389.22x = 537 × 223.44
  4. Step 4: Simplify right side
    389.22x = 119,987.28
  5. Step 5: Solve for x
    x = 119,987.28/389.22
  6. Step 6: Final answer
    x = 308.28

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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.