Home / 270,553-428,390

Finding the Third Proportional to 270,553 and 428,390

Calculator

Solution

The third proportional to 270,553 and 428,390 is: 678,306.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,553 : 428,390 = 428,390 : x
  2. Step 2: Convert to fraction form
    270,553/428,390 = 428,390/x
  3. Step 3: Cross multiply
    270,553x = 428,390 × 428,390
  4. Step 4: Simplify right side
    270,553x = 183,517,992,100
  5. Step 5: Solve for x
    x = 183,517,992,100/270,553
  6. Step 6: Final answer
    x = 678,306.99

Related Problems

Find third proportional to 135,276.50 and 214,195
Half scale
Find third proportional to 541,106 and 856,780
Double scale
Find third proportional to 270,555 and 428,393
Similar ratio
Find third proportional to 405,829.50 and 642,585
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.