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Finding the Fourth Proportional to 3,984.63, 5,976.95 and 1,211.32

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Solution

The fourth proportional to 3,984.63, 5,976.95 and 1,211.32 is: 1,816.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,984.63 : 5,976.95 = 1,211.32 : x
  2. Step 2: Convert to fraction form
    3,984.63/5,976.95 = 1,211.32/x
  3. Step 3: Cross multiply
    3,984.63x = 5,976.95 × 1,211.32
  4. Step 4: Simplify right side
    3,984.63x = 7,239,999.07
  5. Step 5: Solve for x
    x = 7,239,999.07/3,984.63
  6. Step 6: Final answer
    x = 1,816.98

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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.