Home / 74-77

Finding the Third Proportional to 74 and 77

Calculator

Solution

The third proportional to 74 and 77 is: 80.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74 : 77 = 77 : x
  2. Step 2: Convert to fraction form
    74/77 = 77/x
  3. Step 3: Cross multiply
    74x = 77 × 77
  4. Step 4: Simplify right side
    74x = 5,929
  5. Step 5: Solve for x
    x = 5,929/74
  6. Step 6: Final answer
    x = 80.12

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.04) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.