Home / 315,864-690,777

Finding the Third Proportional to 315,864 and 690,777

Calculator

Solution

The third proportional to 315,864 and 690,777 is: 1,510,690.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,864 : 690,777 = 690,777 : x
  2. Step 2: Convert to fraction form
    315,864/690,777 = 690,777/x
  3. Step 3: Cross multiply
    315,864x = 690,777 × 690,777
  4. Step 4: Simplify right side
    315,864x = 477,172,863,729
  5. Step 5: Solve for x
    x = 477,172,863,729/315,864
  6. Step 6: Final answer
    x = 1,510,690.88

Related Problems

Find third proportional to 157,932 and 345,388.50
Half scale
Find third proportional to 631,728 and 1,381,554
Double scale
Find third proportional to 315,866 and 690,781
Similar ratio
Find third proportional to 473,796 and 1,036,165.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.