Home / 210,777-321,417

Finding the Third Proportional to 210,777 and 321,417

Calculator

Solution

The third proportional to 210,777 and 321,417 is: 490,133.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,777 : 321,417 = 321,417 : x
  2. Step 2: Convert to fraction form
    210,777/321,417 = 321,417/x
  3. Step 3: Cross multiply
    210,777x = 321,417 × 321,417
  4. Step 4: Simplify right side
    210,777x = 103,308,887,889
  5. Step 5: Solve for x
    x = 103,308,887,889/210,777
  6. Step 6: Final answer
    x = 490,133.59

Related Problems

Find third proportional to 105,388.50 and 160,708.50
Half scale
Find third proportional to 421,554 and 642,834
Double scale
Find third proportional to 210,779 and 321,420
Similar ratio
Find third proportional to 316,165.50 and 482,125.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.