Home / 3,840-5,760-1,104

Finding the Fourth Proportional to 3,840, 5,760 and 1,104

Calculator

Solution

The fourth proportional to 3,840, 5,760 and 1,104 is: 1,656

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,840 : 5,760 = 1,104 : x
  2. Step 2: Convert to fraction form
    3,840/5,760 = 1,104/x
  3. Step 3: Cross multiply
    3,840x = 5,760 × 1,104
  4. Step 4: Simplify right side
    3,840x = 6,359,040
  5. Step 5: Solve for x
    x = 6,359,040/3,840
  6. Step 6: Final answer
    x = 1,656

Related Problems

Find fourth proportional to 1,920, 2,880 and 552
Half scale
Find fourth proportional to 7,680, 11,520 and 2,208
Double scale
Find fourth proportional to 3,841, 5,761.50 and 1,105
Similar ratio
Find fourth proportional to 5,760, 8,640 and 1,656
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.