Home / 1,288-2,788

Finding the Third Proportional to 1,288 and 2,788

Calculator

Solution

The third proportional to 1,288 and 2,788 is: 6,034.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288 : 2,788 = 2,788 : x
  2. Step 2: Convert to fraction form
    1,288/2,788 = 2,788/x
  3. Step 3: Cross multiply
    1,288x = 2,788 × 2,788
  4. Step 4: Simplify right side
    1,288x = 7,772,944
  5. Step 5: Solve for x
    x = 7,772,944/1,288
  6. Step 6: Final answer
    x = 6,034.89

Related Problems

Find third proportional to 644 and 1,394
Half scale
Find third proportional to 2,576 and 5,576
Double scale
Find third proportional to 1,290 and 2,792
Similar ratio
Find third proportional to 1,932 and 4,182
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.