Home / 100,490-218,458

Finding the Third Proportional to 100,490 and 218,458

Calculator

Solution

The third proportional to 100,490 and 218,458 is: 474,911.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,490 : 218,458 = 218,458 : x
  2. Step 2: Convert to fraction form
    100,490/218,458 = 218,458/x
  3. Step 3: Cross multiply
    100,490x = 218,458 × 218,458
  4. Step 4: Simplify right side
    100,490x = 47,723,897,764
  5. Step 5: Solve for x
    x = 47,723,897,764/100,490
  6. Step 6: Final answer
    x = 474,911.91

Related Problems

Find third proportional to 50,245 and 109,229
Half scale
Find third proportional to 200,980 and 436,916
Double scale
Find third proportional to 100,492 and 218,462
Similar ratio
Find third proportional to 150,735 and 327,687
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.