Home / 221,589-487,458

Finding the Third Proportional to 221,589 and 487,458

Calculator

Solution

The third proportional to 221,589 and 487,458 is: 1,072,324.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,589 : 487,458 = 487,458 : x
  2. Step 2: Convert to fraction form
    221,589/487,458 = 487,458/x
  3. Step 3: Cross multiply
    221,589x = 487,458 × 487,458
  4. Step 4: Simplify right side
    221,589x = 237,615,301,764
  5. Step 5: Solve for x
    x = 237,615,301,764/221,589
  6. Step 6: Final answer
    x = 1,072,324.45

Related Problems

Find third proportional to 110,794.50 and 243,729
Half scale
Find third proportional to 443,178 and 974,916
Double scale
Find third proportional to 221,591 and 487,462
Similar ratio
Find third proportional to 332,383.50 and 731,187
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.