Home / 978.75-1,179

Finding the Third Proportional to 978.75 and 1,179

Calculator

Solution

The third proportional to 978.75 and 1,179 is: 1,420.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    978.75 : 1,179 = 1,179 : x
  2. Step 2: Convert to fraction form
    978.75/1,179 = 1,179/x
  3. Step 3: Cross multiply
    978.75x = 1,179 × 1,179
  4. Step 4: Simplify right side
    978.75x = 1,390,041
  5. Step 5: Solve for x
    x = 1,390,041/978.75
  6. Step 6: Final answer
    x = 1,420.22

Related Problems

Find third proportional to 489.38 and 589.50
Half scale
Find third proportional to 1,957.50 and 2,358
Double scale
Find third proportional to 981 and 1,181
Similar ratio
Find third proportional to 1,468.13 and 1,768.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.