Home / 777-1,638

Finding the Third Proportional to 777 and 1,638

Calculator

Solution

The third proportional to 777 and 1,638 is: 3,453.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    777 : 1,638 = 1,638 : x
  2. Step 2: Convert to fraction form
    777/1,638 = 1,638/x
  3. Step 3: Cross multiply
    777x = 1,638 × 1,638
  4. Step 4: Simplify right side
    777x = 2,683,044
  5. Step 5: Solve for x
    x = 2,683,044/777
  6. Step 6: Final answer
    x = 3,453.08

Related Problems

Find third proportional to 388.50 and 819
Half scale
Find third proportional to 1,554 and 3,276
Double scale
Find third proportional to 779 and 1,642
Similar ratio
Find third proportional to 1,165.50 and 2,457
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.