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Finding the Fourth Proportional to 3,999, 5,998.50 and 1,263

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Solution

The fourth proportional to 3,999, 5,998.50 and 1,263 is: 1,894.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999 : 5,998.50 = 1,263 : x
  2. Step 2: Convert to fraction form
    3,999/5,998.50 = 1,263/x
  3. Step 3: Cross multiply
    3,999x = 5,998.50 × 1,263
  4. Step 4: Simplify right side
    3,999x = 7,576,105.50
  5. Step 5: Solve for x
    x = 7,576,105.50/3,999
  6. Step 6: Final answer
    x = 1,894.50

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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.