Home / 267.78-400.94-139.26

Finding the Fourth Proportional to 267.78, 400.94 and 139.26

Calculator

Solution

The fourth proportional to 267.78, 400.94 and 139.26 is: 208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.78 : 400.94 = 139.26 : x
  2. Step 2: Convert to fraction form
    267.78/400.94 = 139.26/x
  3. Step 3: Cross multiply
    267.78x = 400.94 × 139.26
  4. Step 4: Simplify right side
    267.78x = 55,834.90
  5. Step 5: Solve for x
    x = 55,834.90/267.78
  6. Step 6: Final answer
    x = 208.51

Related Problems

Find fourth proportional to 133.89, 200.47 and 69.63
Half scale
Find fourth proportional to 535.56, 801.88 and 278.52
Double scale
Find fourth proportional to 268.78, 402.44 and 140.26
Similar ratio
Find fourth proportional to 401.67, 601.41 and 208.89
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.