Home / 2,240-4,200

Finding the Third Proportional to 2,240 and 4,200

Calculator

Solution

The third proportional to 2,240 and 4,200 is: 7,875

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,240 : 4,200 = 4,200 : x
  2. Step 2: Convert to fraction form
    2,240/4,200 = 4,200/x
  3. Step 3: Cross multiply
    2,240x = 4,200 × 4,200
  4. Step 4: Simplify right side
    2,240x = 17,640,000
  5. Step 5: Solve for x
    x = 17,640,000/2,240
  6. Step 6: Final answer
    x = 7,875

Related Problems

Find third proportional to 1,120 and 2,100
Half scale
Find third proportional to 4,480 and 8,400
Double scale
Find third proportional to 2,242 and 4,204
Similar ratio
Find third proportional to 3,360 and 6,300
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.