Home / 309,486-677,292

Finding the Third Proportional to 309,486 and 677,292

Calculator

Solution

The third proportional to 309,486 and 677,292 is: 1,482,213.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,486 : 677,292 = 677,292 : x
  2. Step 2: Convert to fraction form
    309,486/677,292 = 677,292/x
  3. Step 3: Cross multiply
    309,486x = 677,292 × 677,292
  4. Step 4: Simplify right side
    309,486x = 458,724,453,264
  5. Step 5: Solve for x
    x = 458,724,453,264/309,486
  6. Step 6: Final answer
    x = 1,482,213.91

Related Problems

Find third proportional to 154,743 and 338,646
Half scale
Find third proportional to 618,972 and 1,354,584
Double scale
Find third proportional to 309,488 and 677,296
Similar ratio
Find third proportional to 464,229 and 1,015,938
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.