Home / 241.66-361.81-138.79

Finding the Fourth Proportional to 241.66, 361.81 and 138.79

Calculator

Solution

The fourth proportional to 241.66, 361.81 and 138.79 is: 207.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.66 : 361.81 = 138.79 : x
  2. Step 2: Convert to fraction form
    241.66/361.81 = 138.79/x
  3. Step 3: Cross multiply
    241.66x = 361.81 × 138.79
  4. Step 4: Simplify right side
    241.66x = 50,215.61
  5. Step 5: Solve for x
    x = 50,215.61/241.66
  6. Step 6: Final answer
    x = 207.79

Related Problems

Find fourth proportional to 120.83, 180.91 and 69.40
Half scale
Find fourth proportional to 483.32, 723.62 and 277.58
Double scale
Find fourth proportional to 242.66, 363.31 and 139.79
Similar ratio
Find fourth proportional to 362.49, 542.72 and 208.19
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.