Home / 256,142-551,740

Finding the Third Proportional to 256,142 and 551,740

Calculator

Solution

The third proportional to 256,142 and 551,740 is: 1,188,469.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,142 : 551,740 = 551,740 : x
  2. Step 2: Convert to fraction form
    256,142/551,740 = 551,740/x
  3. Step 3: Cross multiply
    256,142x = 551,740 × 551,740
  4. Step 4: Simplify right side
    256,142x = 304,417,027,600
  5. Step 5: Solve for x
    x = 304,417,027,600/256,142
  6. Step 6: Final answer
    x = 1,188,469.78

Related Problems

Find third proportional to 128,071 and 275,870
Half scale
Find third proportional to 512,284 and 1,103,480
Double scale
Find third proportional to 256,144 and 551,744
Similar ratio
Find third proportional to 384,213 and 827,610
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.