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Finding the Fourth Proportional to 3,979.96, 5,970 and 1,382.98

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Solution

The fourth proportional to 3,979.96, 5,970 and 1,382.98 is: 2,074.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.96 : 5,970 = 1,382.98 : x
  2. Step 2: Convert to fraction form
    3,979.96/5,970 = 1,382.98/x
  3. Step 3: Cross multiply
    3,979.96x = 5,970 × 1,382.98
  4. Step 4: Simplify right side
    3,979.96x = 8,256,390.60
  5. Step 5: Solve for x
    x = 8,256,390.60/3,979.96
  6. Step 6: Final answer
    x = 2,074.49

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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.