Home / 422,640-618,787

Finding the Third Proportional to 422,640 and 618,787

Calculator

Solution

The third proportional to 422,640 and 618,787 is: 905,965.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,640 : 618,787 = 618,787 : x
  2. Step 2: Convert to fraction form
    422,640/618,787 = 618,787/x
  3. Step 3: Cross multiply
    422,640x = 618,787 × 618,787
  4. Step 4: Simplify right side
    422,640x = 382,897,351,369
  5. Step 5: Solve for x
    x = 382,897,351,369/422,640
  6. Step 6: Final answer
    x = 905,965.72

Related Problems

Find third proportional to 211,320 and 309,393.50
Half scale
Find third proportional to 845,280 and 1,237,574
Double scale
Find third proportional to 422,642 and 618,790
Similar ratio
Find third proportional to 633,960 and 928,180.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.