Home / 309.66-427.40-178.74

Finding the Fourth Proportional to 309.66, 427.40 and 178.74

Calculator

Solution

The fourth proportional to 309.66, 427.40 and 178.74 is: 246.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.66 : 427.40 = 178.74 : x
  2. Step 2: Convert to fraction form
    309.66/427.40 = 178.74/x
  3. Step 3: Cross multiply
    309.66x = 427.40 × 178.74
  4. Step 4: Simplify right side
    309.66x = 76,394.26
  5. Step 5: Solve for x
    x = 76,394.26/309.66
  6. Step 6: Final answer
    x = 246.71

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.