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Finding the Fourth Proportional to 222.30, 333.56 and 135.72

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Solution

The fourth proportional to 222.30, 333.56 and 135.72 is: 203.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.30 : 333.56 = 135.72 : x
  2. Step 2: Convert to fraction form
    222.30/333.56 = 135.72/x
  3. Step 3: Cross multiply
    222.30x = 333.56 × 135.72
  4. Step 4: Simplify right side
    222.30x = 45,270.76
  5. Step 5: Solve for x
    x = 45,270.76/222.30
  6. Step 6: Final answer
    x = 203.65

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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.