Home / 687.64-1,031.58-297.61

Finding the Fourth Proportional to 687.64, 1,031.58 and 297.61

Calculator

Solution

The fourth proportional to 687.64, 1,031.58 and 297.61 is: 446.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    687.64 : 1,031.58 = 297.61 : x
  2. Step 2: Convert to fraction form
    687.64/1,031.58 = 297.61/x
  3. Step 3: Cross multiply
    687.64x = 1,031.58 × 297.61
  4. Step 4: Simplify right side
    687.64x = 307,008.52
  5. Step 5: Solve for x
    x = 307,008.52/687.64
  6. Step 6: Final answer
    x = 446.47

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.