Home / 276-580

Finding the Third Proportional to 276 and 580

Calculator

Solution

The third proportional to 276 and 580 is: 1,218.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    276 : 580 = 580 : x
  2. Step 2: Convert to fraction form
    276/580 = 580/x
  3. Step 3: Cross multiply
    276x = 580 × 580
  4. Step 4: Simplify right side
    276x = 336,400
  5. Step 5: Solve for x
    x = 336,400/276
  6. Step 6: Final answer
    x = 1,218.84

Related Problems

Find third proportional to 138 and 290
Half scale
Find third proportional to 552 and 1,160
Double scale
Find third proportional to 278 and 584
Similar ratio
Find third proportional to 414 and 870
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.