Home / 686.05-1,029.41-425.97

Finding the Fourth Proportional to 686.05, 1,029.41 and 425.97

Calculator

Solution

The fourth proportional to 686.05, 1,029.41 and 425.97 is: 639.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    686.05 : 1,029.41 = 425.97 : x
  2. Step 2: Convert to fraction form
    686.05/1,029.41 = 425.97/x
  3. Step 3: Cross multiply
    686.05x = 1,029.41 × 425.97
  4. Step 4: Simplify right side
    686.05x = 438,497.25
  5. Step 5: Solve for x
    x = 438,497.25/686.05
  6. Step 6: Final answer
    x = 639.16

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.