Home / 612-918-156

Finding the Fourth Proportional to 612, 918 and 156

Calculator

Solution

The fourth proportional to 612, 918 and 156 is: 234

Step by Step Solution

  1. Step 1: Write the proportion equation
    612 : 918 = 156 : x
  2. Step 2: Convert to fraction form
    612/918 = 156/x
  3. Step 3: Cross multiply
    612x = 918 × 156
  4. Step 4: Simplify right side
    612x = 143,208
  5. Step 5: Solve for x
    x = 143,208/612
  6. Step 6: Final answer
    x = 234

Related Problems

Find fourth proportional to 306, 459 and 78
Half scale
Find fourth proportional to 1,224, 1,836 and 312
Double scale
Find fourth proportional to 613, 919.50 and 157
Similar ratio
Find fourth proportional to 918, 1,377 and 234
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.