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Finding the Fourth Proportional to 222.64, 333.90 and 68.58

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Solution

The fourth proportional to 222.64, 333.90 and 68.58 is: 102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.64 : 333.90 = 68.58 : x
  2. Step 2: Convert to fraction form
    222.64/333.90 = 68.58/x
  3. Step 3: Cross multiply
    222.64x = 333.90 × 68.58
  4. Step 4: Simplify right side
    222.64x = 22,898.86
  5. Step 5: Solve for x
    x = 22,898.86/222.64
  6. Step 6: Final answer
    x = 102.85

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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.