Home / 768.30-1,151.69-305.79

Finding the Fourth Proportional to 768.30, 1,151.69 and 305.79

Calculator

Solution

The fourth proportional to 768.30, 1,151.69 and 305.79 is: 458.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    768.30 : 1,151.69 = 305.79 : x
  2. Step 2: Convert to fraction form
    768.30/1,151.69 = 305.79/x
  3. Step 3: Cross multiply
    768.30x = 1,151.69 × 305.79
  4. Step 4: Simplify right side
    768.30x = 352,178.50
  5. Step 5: Solve for x
    x = 352,178.50/768.30
  6. Step 6: Final answer
    x = 458.39

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.