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Finding the Fourth Proportional to 3,986.41, 5,979.62 and 1,064.64

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Solution

The fourth proportional to 3,986.41, 5,979.62 and 1,064.64 is: 1,596.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,986.41 : 5,979.62 = 1,064.64 : x
  2. Step 2: Convert to fraction form
    3,986.41/5,979.62 = 1,064.64/x
  3. Step 3: Cross multiply
    3,986.41x = 5,979.62 × 1,064.64
  4. Step 4: Simplify right side
    3,986.41x = 6,366,139.98
  5. Step 5: Solve for x
    x = 6,366,139.98/3,986.41
  6. Step 6: Final answer
    x = 1,596.96

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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.