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Finding the Fourth Proportional to 222.22, 333 and 215.65

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Solution

The fourth proportional to 222.22, 333 and 215.65 is: 323.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.22 : 333 = 215.65 : x
  2. Step 2: Convert to fraction form
    222.22/333 = 215.65/x
  3. Step 3: Cross multiply
    222.22x = 333 × 215.65
  4. Step 4: Simplify right side
    222.22x = 71,811.45
  5. Step 5: Solve for x
    x = 71,811.45/222.22
  6. Step 6: Final answer
    x = 323.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.