Home / 646.50-1,521

Finding the Third Proportional to 646.50 and 1,521

Calculator

Solution

The third proportional to 646.50 and 1,521 is: 3,578.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    646.50 : 1,521 = 1,521 : x
  2. Step 2: Convert to fraction form
    646.50/1,521 = 1,521/x
  3. Step 3: Cross multiply
    646.50x = 1,521 × 1,521
  4. Step 4: Simplify right side
    646.50x = 2,313,441
  5. Step 5: Solve for x
    x = 2,313,441/646.50
  6. Step 6: Final answer
    x = 3,578.41

Related Problems

Find third proportional to 323.25 and 760.50
Half scale
Find third proportional to 1,293 and 3,042
Double scale
Find third proportional to 649 and 1,526
Similar ratio
Find third proportional to 969.75 and 2,281.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.