Home / 2,639.80-3,959.70-1,664.56

Finding the Fourth Proportional to 2,639.80, 3,959.70 and 1,664.56

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Solution

The fourth proportional to 2,639.80, 3,959.70 and 1,664.56 is: 2,496.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,639.80 : 3,959.70 = 1,664.56 : x
  2. Step 2: Convert to fraction form
    2,639.80/3,959.70 = 1,664.56/x
  3. Step 3: Cross multiply
    2,639.80x = 3,959.70 × 1,664.56
  4. Step 4: Simplify right side
    2,639.80x = 6,591,158.23
  5. Step 5: Solve for x
    x = 6,591,158.23/2,639.80
  6. Step 6: Final answer
    x = 2,496.84

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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.