Home / 1,013.71-1,520.48-320.40

Finding the Fourth Proportional to 1,013.71, 1,520.48 and 320.40

Calculator

Solution

The fourth proportional to 1,013.71, 1,520.48 and 320.40 is: 480.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.71 : 1,520.48 = 320.40 : x
  2. Step 2: Convert to fraction form
    1,013.71/1,520.48 = 320.40/x
  3. Step 3: Cross multiply
    1,013.71x = 1,520.48 × 320.40
  4. Step 4: Simplify right side
    1,013.71x = 487,158.79
  5. Step 5: Solve for x
    x = 487,158.79/1,013.71
  6. Step 6: Final answer
    x = 480.57

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.