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Finding the Fourth Proportional to 222.72, 334.10 and 85.83

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Solution

The fourth proportional to 222.72, 334.10 and 85.83 is: 128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.72 : 334.10 = 85.83 : x
  2. Step 2: Convert to fraction form
    222.72/334.10 = 85.83/x
  3. Step 3: Cross multiply
    222.72x = 334.10 × 85.83
  4. Step 4: Simplify right side
    222.72x = 28,675.80
  5. Step 5: Solve for x
    x = 28,675.80/222.72
  6. Step 6: Final answer
    x = 128.75

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