Home / 408,074-621,137

Finding the Third Proportional to 408,074 and 621,137

Calculator

Solution

The third proportional to 408,074 and 621,137 is: 945,444.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,074 : 621,137 = 621,137 : x
  2. Step 2: Convert to fraction form
    408,074/621,137 = 621,137/x
  3. Step 3: Cross multiply
    408,074x = 621,137 × 621,137
  4. Step 4: Simplify right side
    408,074x = 385,811,172,769
  5. Step 5: Solve for x
    x = 385,811,172,769/408,074
  6. Step 6: Final answer
    x = 945,444.14

Related Problems

Find third proportional to 204,037 and 310,568.50
Half scale
Find third proportional to 816,148 and 1,242,274
Double scale
Find third proportional to 408,076 and 621,140
Similar ratio
Find third proportional to 612,111 and 931,705.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.