Home / 202.50-312.19

Finding the Third Proportional to 202.50 and 312.19

Calculator

Solution

The third proportional to 202.50 and 312.19 is: 481.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    202.50 : 312.19 = 312.19 : x
  2. Step 2: Convert to fraction form
    202.50/312.19 = 312.19/x
  3. Step 3: Cross multiply
    202.50x = 312.19 × 312.19
  4. Step 4: Simplify right side
    202.50x = 97,461.04
  5. Step 5: Solve for x
    x = 97,461.04/202.50
  6. Step 6: Final answer
    x = 481.29

Related Problems

Find third proportional to 101.25 and 156.09
Half scale
Find third proportional to 405 and 624.38
Double scale
Find third proportional to 205 and 315
Similar ratio
Find third proportional to 303.75 and 468.28
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.