Home / 1,642-3,720

Finding the Third Proportional to 1,642 and 3,720

Calculator

Solution

The third proportional to 1,642 and 3,720 is: 8,427.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642 : 3,720 = 3,720 : x
  2. Step 2: Convert to fraction form
    1,642/3,720 = 3,720/x
  3. Step 3: Cross multiply
    1,642x = 3,720 × 3,720
  4. Step 4: Simplify right side
    1,642x = 13,838,400
  5. Step 5: Solve for x
    x = 13,838,400/1,642
  6. Step 6: Final answer
    x = 8,427.77

Related Problems

Find third proportional to 821 and 1,860
Half scale
Find third proportional to 3,284 and 7,440
Double scale
Find third proportional to 1,644 and 3,725
Similar ratio
Find third proportional to 2,463 and 5,580
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.27) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.