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Finding the Fourth Proportional to 838.87, 1,258.21 and 222.62

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Solution

The fourth proportional to 838.87, 1,258.21 and 222.62 is: 333.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.87 : 1,258.21 = 222.62 : x
  2. Step 2: Convert to fraction form
    838.87/1,258.21 = 222.62/x
  3. Step 3: Cross multiply
    838.87x = 1,258.21 × 222.62
  4. Step 4: Simplify right side
    838.87x = 280,099.01
  5. Step 5: Solve for x
    x = 280,099.01/838.87
  6. Step 6: Final answer
    x = 333.90

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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.