Home / 719.28-992.64-408.78

Finding the Fourth Proportional to 719.28, 992.64 and 408.78

Calculator

Solution

The fourth proportional to 719.28, 992.64 and 408.78 is: 564.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.28 : 992.64 = 408.78 : x
  2. Step 2: Convert to fraction form
    719.28/992.64 = 408.78/x
  3. Step 3: Cross multiply
    719.28x = 992.64 × 408.78
  4. Step 4: Simplify right side
    719.28x = 405,771.38
  5. Step 5: Solve for x
    x = 405,771.38/719.28
  6. Step 6: Final answer
    x = 564.14

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.