Home / 312,120-663,120

Finding the Third Proportional to 312,120 and 663,120

Calculator

Solution

The third proportional to 312,120 and 663,120 is: 1,408,843.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,120 : 663,120 = 663,120 : x
  2. Step 2: Convert to fraction form
    312,120/663,120 = 663,120/x
  3. Step 3: Cross multiply
    312,120x = 663,120 × 663,120
  4. Step 4: Simplify right side
    312,120x = 439,728,134,400
  5. Step 5: Solve for x
    x = 439,728,134,400/312,120
  6. Step 6: Final answer
    x = 1,408,843.18

Related Problems

Find third proportional to 156,060 and 331,560
Half scale
Find third proportional to 624,240 and 1,326,240
Double scale
Find third proportional to 312,122 and 663,124
Similar ratio
Find third proportional to 468,180 and 994,680
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.