Home / 393.12-542.14-245.76

Finding the Fourth Proportional to 393.12, 542.14 and 245.76

Calculator

Solution

The fourth proportional to 393.12, 542.14 and 245.76 is: 338.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.12 : 542.14 = 245.76 : x
  2. Step 2: Convert to fraction form
    393.12/542.14 = 245.76/x
  3. Step 3: Cross multiply
    393.12x = 542.14 × 245.76
  4. Step 4: Simplify right side
    393.12x = 133,236.33
  5. Step 5: Solve for x
    x = 133,236.33/393.12
  6. Step 6: Final answer
    x = 338.92

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.