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Finding the Fourth Proportional to 222.40, 333.90 and 141.60

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Solution

The fourth proportional to 222.40, 333.90 and 141.60 is: 212.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    222.40 : 333.90 = 141.60 : x
  2. Step 2: Convert to fraction form
    222.40/333.90 = 141.60/x
  3. Step 3: Cross multiply
    222.40x = 333.90 × 141.60
  4. Step 4: Simplify right side
    222.40x = 47,280.24
  5. Step 5: Solve for x
    x = 47,280.24/222.40
  6. Step 6: Final answer
    x = 212.59

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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.