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Finding the Fourth Proportional to 389.11, 536.91 and 223.33

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Solution

The fourth proportional to 389.11, 536.91 and 223.33 is: 308.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.11 : 536.91 = 223.33 : x
  2. Step 2: Convert to fraction form
    389.11/536.91 = 223.33/x
  3. Step 3: Cross multiply
    389.11x = 536.91 × 223.33
  4. Step 4: Simplify right side
    389.11x = 119,906.77
  5. Step 5: Solve for x
    x = 119,906.77/389.11
  6. Step 6: Final answer
    x = 308.16

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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.