Home / 489,459-689,277

Finding the Third Proportional to 489,459 and 689,277

Calculator

Solution

The third proportional to 489,459 and 689,277 is: 970,669.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,459 : 689,277 = 689,277 : x
  2. Step 2: Convert to fraction form
    489,459/689,277 = 689,277/x
  3. Step 3: Cross multiply
    489,459x = 689,277 × 689,277
  4. Step 4: Simplify right side
    489,459x = 475,102,782,729
  5. Step 5: Solve for x
    x = 475,102,782,729/489,459
  6. Step 6: Final answer
    x = 970,669.21

Related Problems

Find third proportional to 244,729.50 and 344,638.50
Half scale
Find third proportional to 978,918 and 1,378,554
Double scale
Find third proportional to 489,461 and 689,280
Similar ratio
Find third proportional to 734,188.50 and 1,033,915.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.