Home / 309,120-651,448

Finding the Third Proportional to 309,120 and 651,448

Calculator

Solution

The third proportional to 309,120 and 651,448 is: 1,372,879.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,120 : 651,448 = 651,448 : x
  2. Step 2: Convert to fraction form
    309,120/651,448 = 651,448/x
  3. Step 3: Cross multiply
    309,120x = 651,448 × 651,448
  4. Step 4: Simplify right side
    309,120x = 424,384,496,704
  5. Step 5: Solve for x
    x = 424,384,496,704/309,120
  6. Step 6: Final answer
    x = 1,372,879.45

Related Problems

Find third proportional to 154,560 and 325,724
Half scale
Find third proportional to 618,240 and 1,302,896
Double scale
Find third proportional to 309,122 and 651,452
Similar ratio
Find third proportional to 463,680 and 977,172
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.