Home / 511.78-768-238

Finding the Fourth Proportional to 511.78, 768 and 238

Calculator

Solution

The fourth proportional to 511.78, 768 and 238 is: 357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.78 : 768 = 238 : x
  2. Step 2: Convert to fraction form
    511.78/768 = 238/x
  3. Step 3: Cross multiply
    511.78x = 768 × 238
  4. Step 4: Simplify right side
    511.78x = 182,784
  5. Step 5: Solve for x
    x = 182,784/511.78
  6. Step 6: Final answer
    x = 357.15

Related Problems

Find fourth proportional to 255.89, 384 and 119
Half scale
Find fourth proportional to 1,023.56, 1,536 and 476
Double scale
Find fourth proportional to 512.78, 769.50 and 239
Similar ratio
Find fourth proportional to 767.67, 1,152 and 357
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.