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Finding the Fourth Proportional to 742.69, 1,113.67 and 222.56

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Solution

The fourth proportional to 742.69, 1,113.67 and 222.56 is: 333.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.69 : 1,113.67 = 222.56 : x
  2. Step 2: Convert to fraction form
    742.69/1,113.67 = 222.56/x
  3. Step 3: Cross multiply
    742.69x = 1,113.67 × 222.56
  4. Step 4: Simplify right side
    742.69x = 247,858.40
  5. Step 5: Solve for x
    x = 247,858.40/742.69
  6. Step 6: Final answer
    x = 333.73

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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.