Home / 921.50-1,987

Finding the Third Proportional to 921.50 and 1,987

Calculator

Solution

The third proportional to 921.50 and 1,987 is: 4,284.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    921.50 : 1,987 = 1,987 : x
  2. Step 2: Convert to fraction form
    921.50/1,987 = 1,987/x
  3. Step 3: Cross multiply
    921.50x = 1,987 × 1,987
  4. Step 4: Simplify right side
    921.50x = 3,948,169
  5. Step 5: Solve for x
    x = 3,948,169/921.50
  6. Step 6: Final answer
    x = 4,284.50

Related Problems

Find third proportional to 460.75 and 993.50
Half scale
Find third proportional to 1,843 and 3,974
Double scale
Find third proportional to 924 and 1,991
Similar ratio
Find third proportional to 1,382.25 and 2,980.50
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.