Home / 309,108-677,328

Finding the Third Proportional to 309,108 and 677,328

Calculator

Solution

The third proportional to 309,108 and 677,328 is: 1,484,184.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,108 : 677,328 = 677,328 : x
  2. Step 2: Convert to fraction form
    309,108/677,328 = 677,328/x
  3. Step 3: Cross multiply
    309,108x = 677,328 × 677,328
  4. Step 4: Simplify right side
    309,108x = 458,773,219,584
  5. Step 5: Solve for x
    x = 458,773,219,584/309,108
  6. Step 6: Final answer
    x = 1,484,184.23

Related Problems

Find third proportional to 154,554 and 338,664
Half scale
Find third proportional to 618,216 and 1,354,656
Double scale
Find third proportional to 309,110 and 677,332
Similar ratio
Find third proportional to 463,662 and 1,015,992
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.