Home / 338.77-628.17

Finding the Third Proportional to 338.77 and 628.17

Calculator

Solution

The third proportional to 338.77 and 628.17 is: 1,164.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.77 : 628.17 = 628.17 : x
  2. Step 2: Convert to fraction form
    338.77/628.17 = 628.17/x
  3. Step 3: Cross multiply
    338.77x = 628.17 × 628.17
  4. Step 4: Simplify right side
    338.77x = 394,599.90
  5. Step 5: Solve for x
    x = 394,599.90/338.77
  6. Step 6: Final answer
    x = 1,164.82

Related Problems

Find third proportional to 169.38 and 314.09
Half scale
Find third proportional to 677.53 and 1,256.34
Double scale
Find third proportional to 341 and 632
Similar ratio
Find third proportional to 508.15 and 942.26
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.