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Finding the Fourth Proportional to 2,222.25, 3,333.38 and 761.42

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Solution

The fourth proportional to 2,222.25, 3,333.38 and 761.42 is: 1,142.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,222.25 : 3,333.38 = 761.42 : x
  2. Step 2: Convert to fraction form
    2,222.25/3,333.38 = 761.42/x
  3. Step 3: Cross multiply
    2,222.25x = 3,333.38 × 761.42
  4. Step 4: Simplify right side
    2,222.25x = 2,538,081.73
  5. Step 5: Solve for x
    x = 2,538,081.73/2,222.25
  6. Step 6: Final answer
    x = 1,142.12

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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.