Home / 989-2,140

Finding the Third Proportional to 989 and 2,140

Calculator

Solution

The third proportional to 989 and 2,140 is: 4,630.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    989 : 2,140 = 2,140 : x
  2. Step 2: Convert to fraction form
    989/2,140 = 2,140/x
  3. Step 3: Cross multiply
    989x = 2,140 × 2,140
  4. Step 4: Simplify right side
    989x = 4,579,600
  5. Step 5: Solve for x
    x = 4,579,600/989
  6. Step 6: Final answer
    x = 4,630.54

Related Problems

Find third proportional to 494.50 and 1,070
Half scale
Find third proportional to 1,978 and 4,280
Double scale
Find third proportional to 991 and 2,144
Similar ratio
Find third proportional to 1,483.50 and 3,210
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.