Home / 789.75-1,688

Finding the Third Proportional to 789.75 and 1,688

Calculator

Solution

The third proportional to 789.75 and 1,688 is: 3,607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.75 : 1,688 = 1,688 : x
  2. Step 2: Convert to fraction form
    789.75/1,688 = 1,688/x
  3. Step 3: Cross multiply
    789.75x = 1,688 × 1,688
  4. Step 4: Simplify right side
    789.75x = 2,849,344
  5. Step 5: Solve for x
    x = 2,849,344/789.75
  6. Step 6: Final answer
    x = 3,607.91

Related Problems

Find third proportional to 394.88 and 844
Half scale
Find third proportional to 1,579.50 and 3,376
Double scale
Find third proportional to 792 and 1,692
Similar ratio
Find third proportional to 1,184.63 and 2,532
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.