Home / 390,070-618,929

Finding the Third Proportional to 390,070 and 618,929

Calculator

Solution

The third proportional to 390,070 and 618,929 is: 982,062.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,070 : 618,929 = 618,929 : x
  2. Step 2: Convert to fraction form
    390,070/618,929 = 618,929/x
  3. Step 3: Cross multiply
    390,070x = 618,929 × 618,929
  4. Step 4: Simplify right side
    390,070x = 383,073,107,041
  5. Step 5: Solve for x
    x = 383,073,107,041/390,070
  6. Step 6: Final answer
    x = 982,062.47

Related Problems

Find third proportional to 195,035 and 309,464.50
Half scale
Find third proportional to 780,140 and 1,237,858
Double scale
Find third proportional to 390,072 and 618,932
Similar ratio
Find third proportional to 585,105 and 928,393.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.