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Finding the Fourth Proportional to 742.18, 1,112.99 and 222.06

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Solution

The fourth proportional to 742.18, 1,112.99 and 222.06 is: 333.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.18 : 1,112.99 = 222.06 : x
  2. Step 2: Convert to fraction form
    742.18/1,112.99 = 222.06/x
  3. Step 3: Cross multiply
    742.18x = 1,112.99 × 222.06
  4. Step 4: Simplify right side
    742.18x = 247,150.56
  5. Step 5: Solve for x
    x = 247,150.56/742.18
  6. Step 6: Final answer
    x = 333.01

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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.