Home / 619.79-929.72-311.47

Finding the Fourth Proportional to 619.79, 929.72 and 311.47

Calculator

Solution

The fourth proportional to 619.79, 929.72 and 311.47 is: 467.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.79 : 929.72 = 311.47 : x
  2. Step 2: Convert to fraction form
    619.79/929.72 = 311.47/x
  3. Step 3: Cross multiply
    619.79x = 929.72 × 311.47
  4. Step 4: Simplify right side
    619.79x = 289,578.34
  5. Step 5: Solve for x
    x = 289,578.34/619.79
  6. Step 6: Final answer
    x = 467.22

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.