Home / 3,219.80-4,806.40-2,979.32

Finding the Fourth Proportional to 3,219.80, 4,806.40 and 2,979.32

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Solution

The fourth proportional to 3,219.80, 4,806.40 and 2,979.32 is: 4,447.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.80 : 4,806.40 = 2,979.32 : x
  2. Step 2: Convert to fraction form
    3,219.80/4,806.40 = 2,979.32/x
  3. Step 3: Cross multiply
    3,219.80x = 4,806.40 × 2,979.32
  4. Step 4: Simplify right side
    3,219.80x = 14,319,803.65
  5. Step 5: Solve for x
    x = 14,319,803.65/3,219.80
  6. Step 6: Final answer
    x = 4,447.42

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.