Home / 300,018-438,180

Finding the Third Proportional to 300,018 and 438,180

Calculator

Solution

The third proportional to 300,018 and 438,180 is: 639,967.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,018 : 438,180 = 438,180 : x
  2. Step 2: Convert to fraction form
    300,018/438,180 = 438,180/x
  3. Step 3: Cross multiply
    300,018x = 438,180 × 438,180
  4. Step 4: Simplify right side
    300,018x = 192,001,712,400
  5. Step 5: Solve for x
    x = 192,001,712,400/300,018
  6. Step 6: Final answer
    x = 639,967.31

Related Problems

Find third proportional to 150,009 and 219,090
Half scale
Find third proportional to 600,036 and 876,360
Double scale
Find third proportional to 300,020 and 438,183
Similar ratio
Find third proportional to 450,027 and 657,270
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.