Home / 157.50-321.75

Finding the Third Proportional to 157.50 and 321.75

Calculator

Solution

The third proportional to 157.50 and 321.75 is: 657.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    157.50 : 321.75 = 321.75 : x
  2. Step 2: Convert to fraction form
    157.50/321.75 = 321.75/x
  3. Step 3: Cross multiply
    157.50x = 321.75 × 321.75
  4. Step 4: Simplify right side
    157.50x = 103,523.06
  5. Step 5: Solve for x
    x = 103,523.06/157.50
  6. Step 6: Final answer
    x = 657.29

Related Problems

Find third proportional to 78.75 and 160.88
Half scale
Find third proportional to 315 and 643.50
Double scale
Find third proportional to 160 and 326
Similar ratio
Find third proportional to 236.25 and 482.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.