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Finding the Fourth Proportional to 3,979.92, 5,969.94 and 1,206.63

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Solution

The fourth proportional to 3,979.92, 5,969.94 and 1,206.63 is: 1,809.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.92 : 5,969.94 = 1,206.63 : x
  2. Step 2: Convert to fraction form
    3,979.92/5,969.94 = 1,206.63/x
  3. Step 3: Cross multiply
    3,979.92x = 5,969.94 × 1,206.63
  4. Step 4: Simplify right side
    3,979.92x = 7,203,508.70
  5. Step 5: Solve for x
    x = 7,203,508.70/3,979.92
  6. Step 6: Final answer
    x = 1,809.96

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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.