Home / 400.64-600.12-328.40

Finding the Fourth Proportional to 400.64, 600.12 and 328.40

Calculator

Solution

The fourth proportional to 400.64, 600.12 and 328.40 is: 491.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.64 : 600.12 = 328.40 : x
  2. Step 2: Convert to fraction form
    400.64/600.12 = 328.40/x
  3. Step 3: Cross multiply
    400.64x = 600.12 × 328.40
  4. Step 4: Simplify right side
    400.64x = 197,079.41
  5. Step 5: Solve for x
    x = 197,079.41/400.64
  6. Step 6: Final answer
    x = 491.91

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.