Home / 217-326

Finding the Third Proportional to 217 and 326

Calculator

Solution

The third proportional to 217 and 326 is: 489.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    217 : 326 = 326 : x
  2. Step 2: Convert to fraction form
    217/326 = 326/x
  3. Step 3: Cross multiply
    217x = 326 × 326
  4. Step 4: Simplify right side
    217x = 106,276
  5. Step 5: Solve for x
    x = 106,276/217
  6. Step 6: Final answer
    x = 489.75

Related Problems

Find third proportional to 108.50 and 163
Half scale
Find third proportional to 434 and 652
Double scale
Find third proportional to 219 and 329
Similar ratio
Find third proportional to 325.50 and 489
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.