Home / 289.71-431.88-285.27

Finding the Fourth Proportional to 289.71, 431.88 and 285.27

Calculator

Solution

The fourth proportional to 289.71, 431.88 and 285.27 is: 425.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.71 : 431.88 = 285.27 : x
  2. Step 2: Convert to fraction form
    289.71/431.88 = 285.27/x
  3. Step 3: Cross multiply
    289.71x = 431.88 × 285.27
  4. Step 4: Simplify right side
    289.71x = 123,202.41
  5. Step 5: Solve for x
    x = 123,202.41/289.71
  6. Step 6: Final answer
    x = 425.26

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.