Home / 276-480

Finding the Third Proportional to 276 and 480

Calculator

Solution

The third proportional to 276 and 480 is: 834.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    276 : 480 = 480 : x
  2. Step 2: Convert to fraction form
    276/480 = 480/x
  3. Step 3: Cross multiply
    276x = 480 × 480
  4. Step 4: Simplify right side
    276x = 230,400
  5. Step 5: Solve for x
    x = 230,400/276
  6. Step 6: Final answer
    x = 834.78

Related Problems

Find third proportional to 138 and 240
Half scale
Find third proportional to 552 and 960
Double scale
Find third proportional to 278 and 483
Similar ratio
Find third proportional to 414 and 720
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.74) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.