Home / 631-1,305

Finding the Third Proportional to 631 and 1,305

Calculator

Solution

The third proportional to 631 and 1,305 is: 2,698.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    631 : 1,305 = 1,305 : x
  2. Step 2: Convert to fraction form
    631/1,305 = 1,305/x
  3. Step 3: Cross multiply
    631x = 1,305 × 1,305
  4. Step 4: Simplify right side
    631x = 1,703,025
  5. Step 5: Solve for x
    x = 1,703,025/631
  6. Step 6: Final answer
    x = 2,698.93

Related Problems

Find third proportional to 315.50 and 652.50
Half scale
Find third proportional to 1,262 and 2,610
Double scale
Find third proportional to 633 and 1,309
Similar ratio
Find third proportional to 946.50 and 1,957.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.