Home / 658-718

Finding the Third Proportional to 658 and 718

Calculator

Solution

The third proportional to 658 and 718 is: 783.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    658 : 718 = 718 : x
  2. Step 2: Convert to fraction form
    658/718 = 718/x
  3. Step 3: Cross multiply
    658x = 718 × 718
  4. Step 4: Simplify right side
    658x = 515,524
  5. Step 5: Solve for x
    x = 515,524/658
  6. Step 6: Final answer
    x = 783.47

Related Problems

Find third proportional to 329 and 359
Half scale
Find third proportional to 1,316 and 1,436
Double scale
Find third proportional to 660 and 720
Similar ratio
Find third proportional to 987 and 1,077
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.