Home / 389,618-839,420

Finding the Third Proportional to 389,618 and 839,420

Calculator

Solution

The third proportional to 389,618 and 839,420 is: 1,808,504.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,618 : 839,420 = 839,420 : x
  2. Step 2: Convert to fraction form
    389,618/839,420 = 839,420/x
  3. Step 3: Cross multiply
    389,618x = 839,420 × 839,420
  4. Step 4: Simplify right side
    389,618x = 704,625,936,400
  5. Step 5: Solve for x
    x = 704,625,936,400/389,618
  6. Step 6: Final answer
    x = 1,808,504.58

Related Problems

Find third proportional to 194,809 and 419,710
Half scale
Find third proportional to 779,236 and 1,678,840
Double scale
Find third proportional to 389,620 and 839,424
Similar ratio
Find third proportional to 584,427 and 1,259,130
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.