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Finding the Fourth Proportional to 3,979.62, 5,968.98 and 1,205.64

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Solution

The fourth proportional to 3,979.62, 5,968.98 and 1,205.64 is: 1,808.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.62 : 5,968.98 = 1,205.64 : x
  2. Step 2: Convert to fraction form
    3,979.62/5,968.98 = 1,205.64/x
  3. Step 3: Cross multiply
    3,979.62x = 5,968.98 × 1,205.64
  4. Step 4: Simplify right side
    3,979.62x = 7,196,441.05
  5. Step 5: Solve for x
    x = 7,196,441.05/3,979.62
  6. Step 6: Final answer
    x = 1,808.32

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1.5x scale

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.