Home / 290,638-649,316

Finding the Third Proportional to 290,638 and 649,316

Calculator

Solution

The third proportional to 290,638 and 649,316 is: 1,450,640.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,638 : 649,316 = 649,316 : x
  2. Step 2: Convert to fraction form
    290,638/649,316 = 649,316/x
  3. Step 3: Cross multiply
    290,638x = 649,316 × 649,316
  4. Step 4: Simplify right side
    290,638x = 421,611,267,856
  5. Step 5: Solve for x
    x = 421,611,267,856/290,638
  6. Step 6: Final answer
    x = 1,450,640.55

Related Problems

Find third proportional to 145,319 and 324,658
Half scale
Find third proportional to 581,276 and 1,298,632
Double scale
Find third proportional to 290,640 and 649,320
Similar ratio
Find third proportional to 435,957 and 973,974
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.