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Finding the Fourth Proportional to 222.95, 334.44 and 85.92

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Solution

The fourth proportional to 222.95, 334.44 and 85.92 is: 128.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.95 : 334.44 = 85.92 : x
  2. Step 2: Convert to fraction form
    222.95/334.44 = 85.92/x
  3. Step 3: Cross multiply
    222.95x = 334.44 × 85.92
  4. Step 4: Simplify right side
    222.95x = 28,736.02
  5. Step 5: Solve for x
    x = 28,736.02/222.95
  6. Step 6: Final answer
    x = 128.89

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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.