Home / 325-642.50

Finding the Third Proportional to 325 and 642.50

Calculator

Solution

The third proportional to 325 and 642.50 is: 1,270.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    325 : 642.50 = 642.50 : x
  2. Step 2: Convert to fraction form
    325/642.50 = 642.50/x
  3. Step 3: Cross multiply
    325x = 642.50 × 642.50
  4. Step 4: Simplify right side
    325x = 412,806.25
  5. Step 5: Solve for x
    x = 412,806.25/325
  6. Step 6: Final answer
    x = 1,270.17

Related Problems

Find third proportional to 162.50 and 321.25
Half scale
Find third proportional to 650 and 1,285
Double scale
Find third proportional to 327 and 646
Similar ratio
Find third proportional to 487.50 and 963.75
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.