Home / 390,924-853,821

Finding the Third Proportional to 390,924 and 853,821

Calculator

Solution

The third proportional to 390,924 and 853,821 is: 1,864,838.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,924 : 853,821 = 853,821 : x
  2. Step 2: Convert to fraction form
    390,924/853,821 = 853,821/x
  3. Step 3: Cross multiply
    390,924x = 853,821 × 853,821
  4. Step 4: Simplify right side
    390,924x = 729,010,300,041
  5. Step 5: Solve for x
    x = 729,010,300,041/390,924
  6. Step 6: Final answer
    x = 1,864,838.95

Related Problems

Find third proportional to 195,462 and 426,910.50
Half scale
Find third proportional to 781,848 and 1,707,642
Double scale
Find third proportional to 390,926 and 853,825
Similar ratio
Find third proportional to 586,386 and 1,280,731.50
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.