Home / 386,390-829,911

Finding the Third Proportional to 386,390 and 829,911

Calculator

Solution

The third proportional to 386,390 and 829,911 is: 1,782,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,390 : 829,911 = 829,911 : x
  2. Step 2: Convert to fraction form
    386,390/829,911 = 829,911/x
  3. Step 3: Cross multiply
    386,390x = 829,911 × 829,911
  4. Step 4: Simplify right side
    386,390x = 688,752,267,921
  5. Step 5: Solve for x
    x = 688,752,267,921/386,390
  6. Step 6: Final answer
    x = 1,782,531.30

Related Problems

Find third proportional to 193,195 and 414,955.50
Half scale
Find third proportional to 772,780 and 1,659,822
Double scale
Find third proportional to 386,392 and 829,915
Similar ratio
Find third proportional to 579,585 and 1,244,866.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.