Home / 251.13-321.88

Finding the Third Proportional to 251.13 and 321.88

Calculator

Solution

The third proportional to 251.13 and 321.88 is: 412.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.13 : 321.88 = 321.88 : x
  2. Step 2: Convert to fraction form
    251.13/321.88 = 321.88/x
  3. Step 3: Cross multiply
    251.13x = 321.88 × 321.88
  4. Step 4: Simplify right side
    251.13x = 103,603.52
  5. Step 5: Solve for x
    x = 103,603.52/251.13
  6. Step 6: Final answer
    x = 412.56

Related Problems

Find third proportional to 125.56 and 160.94
Half scale
Find third proportional to 502.25 and 643.75
Double scale
Find third proportional to 253 and 324
Similar ratio
Find third proportional to 376.69 and 482.81
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.