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Finding the Fourth Proportional to 379.23, 523.52 and 221.84

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Solution

The fourth proportional to 379.23, 523.52 and 221.84 is: 306.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.23 : 523.52 = 221.84 : x
  2. Step 2: Convert to fraction form
    379.23/523.52 = 221.84/x
  3. Step 3: Cross multiply
    379.23x = 523.52 × 221.84
  4. Step 4: Simplify right side
    379.23x = 116,139.36
  5. Step 5: Solve for x
    x = 116,139.36/379.23
  6. Step 6: Final answer
    x = 306.25

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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.