Home / 417.72-576.24-286.80

Finding the Fourth Proportional to 417.72, 576.24 and 286.80

Calculator

Solution

The fourth proportional to 417.72, 576.24 and 286.80 is: 395.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.72 : 576.24 = 286.80 : x
  2. Step 2: Convert to fraction form
    417.72/576.24 = 286.80/x
  3. Step 3: Cross multiply
    417.72x = 576.24 × 286.80
  4. Step 4: Simplify right side
    417.72x = 165,265.63
  5. Step 5: Solve for x
    x = 165,265.63/417.72
  6. Step 6: Final answer
    x = 395.64

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.