Home / 312-468-190.40

Finding the Fourth Proportional to 312, 468 and 190.40

Calculator

Solution

The fourth proportional to 312, 468 and 190.40 is: 285.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    312 : 468 = 190.40 : x
  2. Step 2: Convert to fraction form
    312/468 = 190.40/x
  3. Step 3: Cross multiply
    312x = 468 × 190.40
  4. Step 4: Simplify right side
    312x = 89,107.20
  5. Step 5: Solve for x
    x = 89,107.20/312
  6. Step 6: Final answer
    x = 285.60

Related Problems

Find fourth proportional to 156, 234 and 95.20
Half scale
Find fourth proportional to 624, 936 and 380.80
Double scale
Find fourth proportional to 313, 469.50 and 191.40
Similar ratio
Find fourth proportional to 468, 702 and 285.60
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.