Home / 556-815

Finding the Third Proportional to 556 and 815

Calculator

Solution

The third proportional to 556 and 815 is: 1,194.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    556 : 815 = 815 : x
  2. Step 2: Convert to fraction form
    556/815 = 815/x
  3. Step 3: Cross multiply
    556x = 815 × 815
  4. Step 4: Simplify right side
    556x = 664,225
  5. Step 5: Solve for x
    x = 664,225/556
  6. Step 6: Final answer
    x = 1,194.65

Related Problems

Find third proportional to 278 and 407.50
Half scale
Find third proportional to 1,112 and 1,630
Double scale
Find third proportional to 558 and 818
Similar ratio
Find third proportional to 834 and 1,222.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.