Home / 312,420-681,376

Finding the Third Proportional to 312,420 and 681,376

Calculator

Solution

The third proportional to 312,420 and 681,376 is: 1,486,054.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,420 : 681,376 = 681,376 : x
  2. Step 2: Convert to fraction form
    312,420/681,376 = 681,376/x
  3. Step 3: Cross multiply
    312,420x = 681,376 × 681,376
  4. Step 4: Simplify right side
    312,420x = 464,273,253,376
  5. Step 5: Solve for x
    x = 464,273,253,376/312,420
  6. Step 6: Final answer
    x = 1,486,054.84

Related Problems

Find third proportional to 156,210 and 340,688
Half scale
Find third proportional to 624,840 and 1,362,752
Double scale
Find third proportional to 312,422 and 681,380
Similar ratio
Find third proportional to 468,630 and 1,022,064
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.