Home / 421,702-637,818

Finding the Third Proportional to 421,702 and 637,818

Calculator

Solution

The third proportional to 421,702 and 637,818 is: 964,690.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,702 : 637,818 = 637,818 : x
  2. Step 2: Convert to fraction form
    421,702/637,818 = 637,818/x
  3. Step 3: Cross multiply
    421,702x = 637,818 × 637,818
  4. Step 4: Simplify right side
    421,702x = 406,811,801,124
  5. Step 5: Solve for x
    x = 406,811,801,124/421,702
  6. Step 6: Final answer
    x = 964,690.23

Related Problems

Find third proportional to 210,851 and 318,909
Half scale
Find third proportional to 843,404 and 1,275,636
Double scale
Find third proportional to 421,704 and 637,821
Similar ratio
Find third proportional to 632,553 and 956,727
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.