Home / 921-1,890

Finding the Third Proportional to 921 and 1,890

Calculator

Solution

The third proportional to 921 and 1,890 is: 3,878.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    921 : 1,890 = 1,890 : x
  2. Step 2: Convert to fraction form
    921/1,890 = 1,890/x
  3. Step 3: Cross multiply
    921x = 1,890 × 1,890
  4. Step 4: Simplify right side
    921x = 3,572,100
  5. Step 5: Solve for x
    x = 3,572,100/921
  6. Step 6: Final answer
    x = 3,878.50

Related Problems

Find third proportional to 460.50 and 945
Half scale
Find third proportional to 1,842 and 3,780
Double scale
Find third proportional to 923 and 1,894
Similar ratio
Find third proportional to 1,381.50 and 2,835
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.