Home / 319-629

Finding the Third Proportional to 319 and 629

Calculator

Solution

The third proportional to 319 and 629 is: 1,240.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    319 : 629 = 629 : x
  2. Step 2: Convert to fraction form
    319/629 = 629/x
  3. Step 3: Cross multiply
    319x = 629 × 629
  4. Step 4: Simplify right side
    319x = 395,641
  5. Step 5: Solve for x
    x = 395,641/319
  6. Step 6: Final answer
    x = 1,240.25

Related Problems

Find third proportional to 159.50 and 314.50
Half scale
Find third proportional to 638 and 1,258
Double scale
Find third proportional to 321 and 633
Similar ratio
Find third proportional to 478.50 and 943.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.