Home / 553-828

Finding the Third Proportional to 553 and 828

Calculator

Solution

The third proportional to 553 and 828 is: 1,239.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    553 : 828 = 828 : x
  2. Step 2: Convert to fraction form
    553/828 = 828/x
  3. Step 3: Cross multiply
    553x = 828 × 828
  4. Step 4: Simplify right side
    553x = 685,584
  5. Step 5: Solve for x
    x = 685,584/553
  6. Step 6: Final answer
    x = 1,239.75

Related Problems

Find third proportional to 276.50 and 414
Half scale
Find third proportional to 1,106 and 1,656
Double scale
Find third proportional to 555 and 831
Similar ratio
Find third proportional to 829.50 and 1,242
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.