Home / 500.63-690.91-279.63

Finding the Fourth Proportional to 500.63, 690.91 and 279.63

Calculator

Solution

The fourth proportional to 500.63, 690.91 and 279.63 is: 385.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.63 : 690.91 = 279.63 : x
  2. Step 2: Convert to fraction form
    500.63/690.91 = 279.63/x
  3. Step 3: Cross multiply
    500.63x = 690.91 × 279.63
  4. Step 4: Simplify right side
    500.63x = 193,198.46
  5. Step 5: Solve for x
    x = 193,198.46/500.63
  6. Step 6: Final answer
    x = 385.91

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.