Home / 687.16-1,030.08-321.64

Finding the Fourth Proportional to 687.16, 1,030.08 and 321.64

Calculator

Solution

The fourth proportional to 687.16, 1,030.08 and 321.64 is: 482.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.16 : 1,030.08 = 321.64 : x
  2. Step 2: Convert to fraction form
    687.16/1,030.08 = 321.64/x
  3. Step 3: Cross multiply
    687.16x = 1,030.08 × 321.64
  4. Step 4: Simplify right side
    687.16x = 331,314.93
  5. Step 5: Solve for x
    x = 331,314.93/687.16
  6. Step 6: Final answer
    x = 482.15

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.