Home / 384-489.75

Finding the Third Proportional to 384 and 489.75

Calculator

Solution

The third proportional to 384 and 489.75 is: 624.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    384 : 489.75 = 489.75 : x
  2. Step 2: Convert to fraction form
    384/489.75 = 489.75/x
  3. Step 3: Cross multiply
    384x = 489.75 × 489.75
  4. Step 4: Simplify right side
    384x = 239,855.06
  5. Step 5: Solve for x
    x = 239,855.06/384
  6. Step 6: Final answer
    x = 624.62

Related Problems

Find third proportional to 192 and 244.88
Half scale
Find third proportional to 768 and 979.50
Double scale
Find third proportional to 386 and 492
Similar ratio
Find third proportional to 576 and 734.63
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.