Home / 436-487

Finding the Third Proportional to 436 and 487

Calculator

Solution

The third proportional to 436 and 487 is: 543.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    436 : 487 = 487 : x
  2. Step 2: Convert to fraction form
    436/487 = 487/x
  3. Step 3: Cross multiply
    436x = 487 × 487
  4. Step 4: Simplify right side
    436x = 237,169
  5. Step 5: Solve for x
    x = 237,169/436
  6. Step 6: Final answer
    x = 543.97

Related Problems

Find third proportional to 218 and 243.50
Half scale
Find third proportional to 872 and 974
Double scale
Find third proportional to 438 and 489
Similar ratio
Find third proportional to 654 and 730.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.