Home / 419.55-630.28

Finding the Third Proportional to 419.55 and 630.28

Calculator

Solution

The third proportional to 419.55 and 630.28 is: 946.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.55 : 630.28 = 630.28 : x
  2. Step 2: Convert to fraction form
    419.55/630.28 = 630.28/x
  3. Step 3: Cross multiply
    419.55x = 630.28 × 630.28
  4. Step 4: Simplify right side
    419.55x = 397,254.45
  5. Step 5: Solve for x
    x = 397,254.45/419.55
  6. Step 6: Final answer
    x = 946.85

Related Problems

Find third proportional to 209.78 and 315.14
Half scale
Find third proportional to 839.11 and 1,260.56
Double scale
Find third proportional to 422 and 633
Similar ratio
Find third proportional to 629.33 and 945.42
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.