Home / 387.20-533.76-255.98

Finding the Fourth Proportional to 387.20, 533.76 and 255.98

Calculator

Solution

The fourth proportional to 387.20, 533.76 and 255.98 is: 352.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.20 : 533.76 = 255.98 : x
  2. Step 2: Convert to fraction form
    387.20/533.76 = 255.98/x
  3. Step 3: Cross multiply
    387.20x = 533.76 × 255.98
  4. Step 4: Simplify right side
    387.20x = 136,631.88
  5. Step 5: Solve for x
    x = 136,631.88/387.20
  6. Step 6: Final answer
    x = 352.87

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.