Home / 311,940-638,632

Finding the Third Proportional to 311,940 and 638,632

Calculator

Solution

The third proportional to 311,940 and 638,632 is: 1,307,465.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,940 : 638,632 = 638,632 : x
  2. Step 2: Convert to fraction form
    311,940/638,632 = 638,632/x
  3. Step 3: Cross multiply
    311,940x = 638,632 × 638,632
  4. Step 4: Simplify right side
    311,940x = 407,850,831,424
  5. Step 5: Solve for x
    x = 407,850,831,424/311,940
  6. Step 6: Final answer
    x = 1,307,465.64

Related Problems

Find third proportional to 155,970 and 319,316
Half scale
Find third proportional to 623,880 and 1,277,264
Double scale
Find third proportional to 311,942 and 638,636
Similar ratio
Find third proportional to 467,910 and 957,948
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.