Home / 204.25-316.25

Finding the Third Proportional to 204.25 and 316.25

Calculator

Solution

The third proportional to 204.25 and 316.25 is: 489.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    204.25 : 316.25 = 316.25 : x
  2. Step 2: Convert to fraction form
    204.25/316.25 = 316.25/x
  3. Step 3: Cross multiply
    204.25x = 316.25 × 316.25
  4. Step 4: Simplify right side
    204.25x = 100,014.06
  5. Step 5: Solve for x
    x = 100,014.06/204.25
  6. Step 6: Final answer
    x = 489.66

Related Problems

Find third proportional to 102.13 and 158.13
Half scale
Find third proportional to 408.50 and 632.50
Double scale
Find third proportional to 206 and 319
Similar ratio
Find third proportional to 306.38 and 474.38
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.