Home / 215,392-308,318

Finding the Third Proportional to 215,392 and 308,318

Calculator

Solution

The third proportional to 215,392 and 308,318 is: 441,334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,392 : 308,318 = 308,318 : x
  2. Step 2: Convert to fraction form
    215,392/308,318 = 308,318/x
  3. Step 3: Cross multiply
    215,392x = 308,318 × 308,318
  4. Step 4: Simplify right side
    215,392x = 95,059,989,124
  5. Step 5: Solve for x
    x = 95,059,989,124/215,392
  6. Step 6: Final answer
    x = 441,334.82

Related Problems

Find third proportional to 107,696 and 154,159
Half scale
Find third proportional to 430,784 and 616,636
Double scale
Find third proportional to 215,394 and 308,321
Similar ratio
Find third proportional to 323,088 and 462,477
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.