Home / 312.93-431.76-188.55

Finding the Fourth Proportional to 312.93, 431.76 and 188.55

Calculator

Solution

The fourth proportional to 312.93, 431.76 and 188.55 is: 260.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.93 : 431.76 = 188.55 : x
  2. Step 2: Convert to fraction form
    312.93/431.76 = 188.55/x
  3. Step 3: Cross multiply
    312.93x = 431.76 × 188.55
  4. Step 4: Simplify right side
    312.93x = 81,408.35
  5. Step 5: Solve for x
    x = 81,408.35/312.93
  6. Step 6: Final answer
    x = 260.15

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.