Home / 395.13-620.69

Finding the Third Proportional to 395.13 and 620.69

Calculator

Solution

The third proportional to 395.13 and 620.69 is: 975.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.13 : 620.69 = 620.69 : x
  2. Step 2: Convert to fraction form
    395.13/620.69 = 620.69/x
  3. Step 3: Cross multiply
    395.13x = 620.69 × 620.69
  4. Step 4: Simplify right side
    395.13x = 385,252.97
  5. Step 5: Solve for x
    x = 385,252.97/395.13
  6. Step 6: Final answer
    x = 975.02

Related Problems

Find third proportional to 197.56 and 310.34
Half scale
Find third proportional to 790.25 and 1,241.38
Double scale
Find third proportional to 397 and 624
Similar ratio
Find third proportional to 592.69 and 931.03
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.