Home / 396,990-857,403

Finding the Third Proportional to 396,990 and 857,403

Calculator

Solution

The third proportional to 396,990 and 857,403 is: 1,851,784.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    396,990 : 857,403 = 857,403 : x
  2. Step 2: Convert to fraction form
    396,990/857,403 = 857,403/x
  3. Step 3: Cross multiply
    396,990x = 857,403 × 857,403
  4. Step 4: Simplify right side
    396,990x = 735,139,904,409
  5. Step 5: Solve for x
    x = 735,139,904,409/396,990
  6. Step 6: Final answer
    x = 1,851,784.44

Related Problems

Find third proportional to 198,495 and 428,701.50
Half scale
Find third proportional to 793,980 and 1,714,806
Double scale
Find third proportional to 396,992 and 857,407
Similar ratio
Find third proportional to 595,485 and 1,286,104.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.