Home / 345,840-518,760

Finding the Third Proportional to 345,840 and 518,760

Calculator

Solution

The third proportional to 345,840 and 518,760 is: 778,140

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,840 : 518,760 = 518,760 : x
  2. Step 2: Convert to fraction form
    345,840/518,760 = 518,760/x
  3. Step 3: Cross multiply
    345,840x = 518,760 × 518,760
  4. Step 4: Simplify right side
    345,840x = 269,111,937,600
  5. Step 5: Solve for x
    x = 269,111,937,600/345,840
  6. Step 6: Final answer
    x = 778,140

Related Problems

Find third proportional to 172,920 and 259,380
Half scale
Find third proportional to 691,680 and 1,037,520
Double scale
Find third proportional to 345,842 and 518,763
Similar ratio
Find third proportional to 518,760 and 778,140
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.