Home / 499.59-689.42-278.53

Finding the Fourth Proportional to 499.59, 689.42 and 278.53

Calculator

Solution

The fourth proportional to 499.59, 689.42 and 278.53 is: 384.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    499.59 : 689.42 = 278.53 : x
  2. Step 2: Convert to fraction form
    499.59/689.42 = 278.53/x
  3. Step 3: Cross multiply
    499.59x = 689.42 × 278.53
  4. Step 4: Simplify right side
    499.59x = 192,025.01
  5. Step 5: Solve for x
    x = 192,025.01/499.59
  6. Step 6: Final answer
    x = 384.37

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.