Home / 259-359

Finding the Third Proportional to 259 and 359

Calculator

Solution

The third proportional to 259 and 359 is: 497.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    259 : 359 = 359 : x
  2. Step 2: Convert to fraction form
    259/359 = 359/x
  3. Step 3: Cross multiply
    259x = 359 × 359
  4. Step 4: Simplify right side
    259x = 128,881
  5. Step 5: Solve for x
    x = 128,881/259
  6. Step 6: Final answer
    x = 497.61

Related Problems

Find third proportional to 129.50 and 179.50
Half scale
Find third proportional to 518 and 718
Double scale
Find third proportional to 261 and 362
Similar ratio
Find third proportional to 388.50 and 538.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.