Home / 311,131-678,575

Finding the Third Proportional to 311,131 and 678,575

Calculator

Solution

The third proportional to 311,131 and 678,575 is: 1,479,968.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,131 : 678,575 = 678,575 : x
  2. Step 2: Convert to fraction form
    311,131/678,575 = 678,575/x
  3. Step 3: Cross multiply
    311,131x = 678,575 × 678,575
  4. Step 4: Simplify right side
    311,131x = 460,464,030,625
  5. Step 5: Solve for x
    x = 460,464,030,625/311,131
  6. Step 6: Final answer
    x = 1,479,968.34

Related Problems

Find third proportional to 155,565.50 and 339,287.50
Half scale
Find third proportional to 622,262 and 1,357,150
Double scale
Find third proportional to 311,133 and 678,579
Similar ratio
Find third proportional to 466,696.50 and 1,017,862.50
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.