Home / 258,221-557,230

Finding the Third Proportional to 258,221 and 557,230

Calculator

Solution

The third proportional to 258,221 and 557,230 is: 1,202,478.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,221 : 557,230 = 557,230 : x
  2. Step 2: Convert to fraction form
    258,221/557,230 = 557,230/x
  3. Step 3: Cross multiply
    258,221x = 557,230 × 557,230
  4. Step 4: Simplify right side
    258,221x = 310,505,272,900
  5. Step 5: Solve for x
    x = 310,505,272,900/258,221
  6. Step 6: Final answer
    x = 1,202,478.78

Related Problems

Find third proportional to 129,110.50 and 278,615
Half scale
Find third proportional to 516,442 and 1,114,460
Double scale
Find third proportional to 258,223 and 557,234
Similar ratio
Find third proportional to 387,331.50 and 835,845
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.