Home / 631.13-1,380.38

Finding the Third Proportional to 631.13 and 1,380.38

Calculator

Solution

The third proportional to 631.13 and 1,380.38 is: 3,019.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.13 : 1,380.38 = 1,380.38 : x
  2. Step 2: Convert to fraction form
    631.13/1,380.38 = 1,380.38/x
  3. Step 3: Cross multiply
    631.13x = 1,380.38 × 1,380.38
  4. Step 4: Simplify right side
    631.13x = 1,905,435.14
  5. Step 5: Solve for x
    x = 1,905,435.14/631.13
  6. Step 6: Final answer
    x = 3,019.11

Related Problems

Find third proportional to 315.56 and 690.19
Half scale
Find third proportional to 1,262.25 and 2,760.75
Double scale
Find third proportional to 633 and 1,385
Similar ratio
Find third proportional to 946.69 and 2,070.56
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.