Home / 960-1,440-276

Finding the Fourth Proportional to 960, 1,440 and 276

Calculator

Solution

The fourth proportional to 960, 1,440 and 276 is: 414

Step by Step Solution

  1. Step 1: Write the proportion equation
    960 : 1,440 = 276 : x
  2. Step 2: Convert to fraction form
    960/1,440 = 276/x
  3. Step 3: Cross multiply
    960x = 1,440 × 276
  4. Step 4: Simplify right side
    960x = 397,440
  5. Step 5: Solve for x
    x = 397,440/960
  6. Step 6: Final answer
    x = 414

Related Problems

Find fourth proportional to 480, 720 and 138
Half scale
Find fourth proportional to 1,920, 2,880 and 552
Double scale
Find fourth proportional to 961, 1,441.50 and 277
Similar ratio
Find fourth proportional to 1,440, 2,160 and 414
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.