Home / 308.74-679.92

Finding the Third Proportional to 308.74 and 679.92

Calculator

Solution

The third proportional to 308.74 and 679.92 is: 1,497.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.74 : 679.92 = 679.92 : x
  2. Step 2: Convert to fraction form
    308.74/679.92 = 679.92/x
  3. Step 3: Cross multiply
    308.74x = 679.92 × 679.92
  4. Step 4: Simplify right side
    308.74x = 462,293.76
  5. Step 5: Solve for x
    x = 462,293.76/308.74
  6. Step 6: Final answer
    x = 1,497.35

Related Problems

Find third proportional to 154.37 and 339.96
Half scale
Find third proportional to 617.48 and 1,359.84
Double scale
Find third proportional to 311 and 684
Similar ratio
Find third proportional to 463.11 and 1,019.88
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.