Home / 291,219-636,318

Finding the Third Proportional to 291,219 and 636,318

Calculator

Solution

The third proportional to 291,219 and 636,318 is: 1,390,364.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,219 : 636,318 = 636,318 : x
  2. Step 2: Convert to fraction form
    291,219/636,318 = 636,318/x
  3. Step 3: Cross multiply
    291,219x = 636,318 × 636,318
  4. Step 4: Simplify right side
    291,219x = 404,900,597,124
  5. Step 5: Solve for x
    x = 404,900,597,124/291,219
  6. Step 6: Final answer
    x = 1,390,364.63

Related Problems

Find third proportional to 145,609.50 and 318,159
Half scale
Find third proportional to 582,438 and 1,272,636
Double scale
Find third proportional to 291,221 and 636,322
Similar ratio
Find third proportional to 436,828.50 and 954,477
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.