Home / 478.09-717.20-153.38

Finding the Fourth Proportional to 478.09, 717.20 and 153.38

Calculator

Solution

The fourth proportional to 478.09, 717.20 and 153.38 is: 230.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.09 : 717.20 = 153.38 : x
  2. Step 2: Convert to fraction form
    478.09/717.20 = 153.38/x
  3. Step 3: Cross multiply
    478.09x = 717.20 × 153.38
  4. Step 4: Simplify right side
    478.09x = 110,004.14
  5. Step 5: Solve for x
    x = 110,004.14/478.09
  6. Step 6: Final answer
    x = 230.09

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.