Home / 285,360-427,149

Finding the Third Proportional to 285,360 and 427,149

Calculator

Solution

The third proportional to 285,360 and 427,149 is: 639,389.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,360 : 427,149 = 427,149 : x
  2. Step 2: Convert to fraction form
    285,360/427,149 = 427,149/x
  3. Step 3: Cross multiply
    285,360x = 427,149 × 427,149
  4. Step 4: Simplify right side
    285,360x = 182,456,268,201
  5. Step 5: Solve for x
    x = 182,456,268,201/285,360
  6. Step 6: Final answer
    x = 639,389.78

Related Problems

Find third proportional to 142,680 and 213,574.50
Half scale
Find third proportional to 570,720 and 854,298
Double scale
Find third proportional to 285,362 and 427,152
Similar ratio
Find third proportional to 428,040 and 640,723.50
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.