Home / 789.38-1,089.40-457.82

Finding the Fourth Proportional to 789.38, 1,089.40 and 457.82

Calculator

Solution

The fourth proportional to 789.38, 1,089.40 and 457.82 is: 631.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.38 : 1,089.40 = 457.82 : x
  2. Step 2: Convert to fraction form
    789.38/1,089.40 = 457.82/x
  3. Step 3: Cross multiply
    789.38x = 1,089.40 × 457.82
  4. Step 4: Simplify right side
    789.38x = 498,749.11
  5. Step 5: Solve for x
    x = 498,749.11/789.38
  6. Step 6: Final answer
    x = 631.82

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.