Home / 202,815-315,285

Finding the Third Proportional to 202,815 and 315,285

Calculator

Solution

The third proportional to 202,815 and 315,285 is: 490,124.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,815 : 315,285 = 315,285 : x
  2. Step 2: Convert to fraction form
    202,815/315,285 = 315,285/x
  3. Step 3: Cross multiply
    202,815x = 315,285 × 315,285
  4. Step 4: Simplify right side
    202,815x = 99,404,631,225
  5. Step 5: Solve for x
    x = 99,404,631,225/202,815
  6. Step 6: Final answer
    x = 490,124.65

Related Problems

Find third proportional to 101,407.50 and 157,642.50
Half scale
Find third proportional to 405,630 and 630,570
Double scale
Find third proportional to 202,817 and 315,288
Similar ratio
Find third proportional to 304,222.50 and 472,927.50
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.