Home / 216-455.25

Finding the Third Proportional to 216 and 455.25

Calculator

Solution

The third proportional to 216 and 455.25 is: 959.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    216 : 455.25 = 455.25 : x
  2. Step 2: Convert to fraction form
    216/455.25 = 455.25/x
  3. Step 3: Cross multiply
    216x = 455.25 × 455.25
  4. Step 4: Simplify right side
    216x = 207,252.56
  5. Step 5: Solve for x
    x = 207,252.56/216
  6. Step 6: Final answer
    x = 959.50

Related Problems

Find third proportional to 108 and 227.63
Half scale
Find third proportional to 432 and 910.50
Double scale
Find third proportional to 218 and 459
Similar ratio
Find third proportional to 324 and 682.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.