Home / 3,280.44-4,921.26-1,980.36

Finding the Fourth Proportional to 3,280.44, 4,921.26 and 1,980.36

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Solution

The fourth proportional to 3,280.44, 4,921.26 and 1,980.36 is: 2,970.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,280.44 : 4,921.26 = 1,980.36 : x
  2. Step 2: Convert to fraction form
    3,280.44/4,921.26 = 1,980.36/x
  3. Step 3: Cross multiply
    3,280.44x = 4,921.26 × 1,980.36
  4. Step 4: Simplify right side
    3,280.44x = 9,745,866.45
  5. Step 5: Solve for x
    x = 9,745,866.45/3,280.44
  6. Step 6: Final answer
    x = 2,970.90

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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.