Home / 276,828-427,509

Finding the Third Proportional to 276,828 and 427,509

Calculator

Solution

The third proportional to 276,828 and 427,509 is: 660,207.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,828 : 427,509 = 427,509 : x
  2. Step 2: Convert to fraction form
    276,828/427,509 = 427,509/x
  3. Step 3: Cross multiply
    276,828x = 427,509 × 427,509
  4. Step 4: Simplify right side
    276,828x = 182,763,945,081
  5. Step 5: Solve for x
    x = 182,763,945,081/276,828
  6. Step 6: Final answer
    x = 660,207.58

Related Problems

Find third proportional to 138,414 and 213,754.50
Half scale
Find third proportional to 553,656 and 855,018
Double scale
Find third proportional to 276,830 and 427,512
Similar ratio
Find third proportional to 415,242 and 641,263.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.