Home / 537.89-742.19-390.58

Finding the Fourth Proportional to 537.89, 742.19 and 390.58

Calculator

Solution

The fourth proportional to 537.89, 742.19 and 390.58 is: 538.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    537.89 : 742.19 = 390.58 : x
  2. Step 2: Convert to fraction form
    537.89/742.19 = 390.58/x
  3. Step 3: Cross multiply
    537.89x = 742.19 × 390.58
  4. Step 4: Simplify right side
    537.89x = 289,880.76
  5. Step 5: Solve for x
    x = 289,880.76/537.89
  6. Step 6: Final answer
    x = 538.93

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.