Home / 549-660

Finding the Third Proportional to 549 and 660

Calculator

Solution

The third proportional to 549 and 660 is: 793.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    549 : 660 = 660 : x
  2. Step 2: Convert to fraction form
    549/660 = 660/x
  3. Step 3: Cross multiply
    549x = 660 × 660
  4. Step 4: Simplify right side
    549x = 435,600
  5. Step 5: Solve for x
    x = 435,600/549
  6. Step 6: Final answer
    x = 793.44

Related Problems

Find third proportional to 274.50 and 330
Half scale
Find third proportional to 1,098 and 1,320
Double scale
Find third proportional to 551 and 662
Similar ratio
Find third proportional to 823.50 and 990
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.