Home / 258,218-559,318

Finding the Third Proportional to 258,218 and 559,318

Calculator

Solution

The third proportional to 258,218 and 559,318 is: 1,211,521.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,218 : 559,318 = 559,318 : x
  2. Step 2: Convert to fraction form
    258,218/559,318 = 559,318/x
  3. Step 3: Cross multiply
    258,218x = 559,318 × 559,318
  4. Step 4: Simplify right side
    258,218x = 312,836,625,124
  5. Step 5: Solve for x
    x = 312,836,625,124/258,218
  6. Step 6: Final answer
    x = 1,211,521.37

Related Problems

Find third proportional to 129,109 and 279,659
Half scale
Find third proportional to 516,436 and 1,118,636
Double scale
Find third proportional to 258,220 and 559,322
Similar ratio
Find third proportional to 387,327 and 838,977
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.