Home / 1,821-2,430

Finding the Third Proportional to 1,821 and 2,430

Calculator

Solution

The third proportional to 1,821 and 2,430 is: 3,242.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821 : 2,430 = 2,430 : x
  2. Step 2: Convert to fraction form
    1,821/2,430 = 2,430/x
  3. Step 3: Cross multiply
    1,821x = 2,430 × 2,430
  4. Step 4: Simplify right side
    1,821x = 5,904,900
  5. Step 5: Solve for x
    x = 5,904,900/1,821
  6. Step 6: Final answer
    x = 3,242.67

Related Problems

Find third proportional to 910.50 and 1,215
Half scale
Find third proportional to 3,642 and 4,860
Double scale
Find third proportional to 1,823 and 2,433
Similar ratio
Find third proportional to 2,731.50 and 3,645
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.