Home / 730.88-1,008.64-420.38

Finding the Fourth Proportional to 730.88, 1,008.64 and 420.38

Calculator

Solution

The fourth proportional to 730.88, 1,008.64 and 420.38 is: 580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    730.88 : 1,008.64 = 420.38 : x
  2. Step 2: Convert to fraction form
    730.88/1,008.64 = 420.38/x
  3. Step 3: Cross multiply
    730.88x = 1,008.64 × 420.38
  4. Step 4: Simplify right side
    730.88x = 424,005.99
  5. Step 5: Solve for x
    x = 424,005.99/730.88
  6. Step 6: Final answer
    x = 580.13

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.