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Finding the Fourth Proportional to 223.56, 333.18 and 215.64

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Solution

The fourth proportional to 223.56, 333.18 and 215.64 is: 321.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    223.56 : 333.18 = 215.64 : x
  2. Step 2: Convert to fraction form
    223.56/333.18 = 215.64/x
  3. Step 3: Cross multiply
    223.56x = 333.18 × 215.64
  4. Step 4: Simplify right side
    223.56x = 71,846.94
  5. Step 5: Solve for x
    x = 71,846.94/223.56
  6. Step 6: Final answer
    x = 321.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.