Home / 1,426-2,139-400

Finding the Fourth Proportional to 1,426, 2,139 and 400

Calculator

Solution

The fourth proportional to 1,426, 2,139 and 400 is: 600

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426 : 2,139 = 400 : x
  2. Step 2: Convert to fraction form
    1,426/2,139 = 400/x
  3. Step 3: Cross multiply
    1,426x = 2,139 × 400
  4. Step 4: Simplify right side
    1,426x = 855,600
  5. Step 5: Solve for x
    x = 855,600/1,426
  6. Step 6: Final answer
    x = 600

Related Problems

Find fourth proportional to 713, 1,069.50 and 200
Half scale
Find fourth proportional to 2,852, 4,278 and 800
Double scale
Find fourth proportional to 1,427, 2,140.50 and 401
Similar ratio
Find fourth proportional to 2,139, 3,208.50 and 600
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.