Home / 558-828

Finding the Third Proportional to 558 and 828

Calculator

Solution

The third proportional to 558 and 828 is: 1,228.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    558 : 828 = 828 : x
  2. Step 2: Convert to fraction form
    558/828 = 828/x
  3. Step 3: Cross multiply
    558x = 828 × 828
  4. Step 4: Simplify right side
    558x = 685,584
  5. Step 5: Solve for x
    x = 685,584/558
  6. Step 6: Final answer
    x = 1,228.65

Related Problems

Find third proportional to 279 and 414
Half scale
Find third proportional to 1,116 and 1,656
Double scale
Find third proportional to 560 and 831
Similar ratio
Find third proportional to 837 and 1,242
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.