Home / 929.72-1,394.79-280.41

Finding the Fourth Proportional to 929.72, 1,394.79 and 280.41

Calculator

Solution

The fourth proportional to 929.72, 1,394.79 and 280.41 is: 420.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.72 : 1,394.79 = 280.41 : x
  2. Step 2: Convert to fraction form
    929.72/1,394.79 = 280.41/x
  3. Step 3: Cross multiply
    929.72x = 1,394.79 × 280.41
  4. Step 4: Simplify right side
    929.72x = 391,106.78
  5. Step 5: Solve for x
    x = 391,106.78/929.72
  6. Step 6: Final answer
    x = 420.67

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.