Home / 218,709-469,980

Finding the Third Proportional to 218,709 and 469,980

Calculator

Solution

The third proportional to 218,709 and 469,980 is: 1,009,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,709 : 469,980 = 469,980 : x
  2. Step 2: Convert to fraction form
    218,709/469,980 = 469,980/x
  3. Step 3: Cross multiply
    218,709x = 469,980 × 469,980
  4. Step 4: Simplify right side
    218,709x = 220,881,200,400
  5. Step 5: Solve for x
    x = 220,881,200,400/218,709
  6. Step 6: Final answer
    x = 1,009,931.92

Related Problems

Find third proportional to 109,354.50 and 234,990
Half scale
Find third proportional to 437,418 and 939,960
Double scale
Find third proportional to 218,711 and 469,984
Similar ratio
Find third proportional to 328,063.50 and 704,970
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.