Home / 214.50-489

Finding the Third Proportional to 214.50 and 489

Calculator

Solution

The third proportional to 214.50 and 489 is: 1,114.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    214.50 : 489 = 489 : x
  2. Step 2: Convert to fraction form
    214.50/489 = 489/x
  3. Step 3: Cross multiply
    214.50x = 489 × 489
  4. Step 4: Simplify right side
    214.50x = 239,121
  5. Step 5: Solve for x
    x = 239,121/214.50
  6. Step 6: Final answer
    x = 1,114.78

Related Problems

Find third proportional to 107.25 and 244.50
Half scale
Find third proportional to 429 and 978
Double scale
Find third proportional to 217 and 494
Similar ratio
Find third proportional to 321.75 and 733.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.