Home / 687.38-1,031.12-200.43

Finding the Fourth Proportional to 687.38, 1,031.12 and 200.43

Calculator

Solution

The fourth proportional to 687.38, 1,031.12 and 200.43 is: 300.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.38 : 1,031.12 = 200.43 : x
  2. Step 2: Convert to fraction form
    687.38/1,031.12 = 200.43/x
  3. Step 3: Cross multiply
    687.38x = 1,031.12 × 200.43
  4. Step 4: Simplify right side
    687.38x = 206,666.38
  5. Step 5: Solve for x
    x = 206,666.38/687.38
  6. Step 6: Final answer
    x = 300.66

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.