Home / 408,078-612,120

Finding the Third Proportional to 408,078 and 612,120

Calculator

Solution

The third proportional to 408,078 and 612,120 is: 918,184.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,078 : 612,120 = 612,120 : x
  2. Step 2: Convert to fraction form
    408,078/612,120 = 612,120/x
  3. Step 3: Cross multiply
    408,078x = 612,120 × 612,120
  4. Step 4: Simplify right side
    408,078x = 374,690,894,400
  5. Step 5: Solve for x
    x = 374,690,894,400/408,078
  6. Step 6: Final answer
    x = 918,184.50

Related Problems

Find third proportional to 204,039 and 306,060
Half scale
Find third proportional to 816,156 and 1,224,240
Double scale
Find third proportional to 408,080 and 612,123
Similar ratio
Find third proportional to 612,117 and 918,180
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.