Home / 344.28-516.78-161.76

Finding the Fourth Proportional to 344.28, 516.78 and 161.76

Calculator

Solution

The fourth proportional to 344.28, 516.78 and 161.76 is: 242.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.28 : 516.78 = 161.76 : x
  2. Step 2: Convert to fraction form
    344.28/516.78 = 161.76/x
  3. Step 3: Cross multiply
    344.28x = 516.78 × 161.76
  4. Step 4: Simplify right side
    344.28x = 83,594.33
  5. Step 5: Solve for x
    x = 83,594.33/344.28
  6. Step 6: Final answer
    x = 242.81

Related Problems

Find fourth proportional to 172.14, 258.39 and 80.88
Half scale
Find fourth proportional to 688.56, 1,033.56 and 323.52
Double scale
Find fourth proportional to 345.28, 518.28 and 162.76
Similar ratio
Find fourth proportional to 516.42, 775.17 and 242.64
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.