Home / 925.66-1,388.72-405.78

Finding the Fourth Proportional to 925.66, 1,388.72 and 405.78

Calculator

Solution

The fourth proportional to 925.66, 1,388.72 and 405.78 is: 608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.66 : 1,388.72 = 405.78 : x
  2. Step 2: Convert to fraction form
    925.66/1,388.72 = 405.78/x
  3. Step 3: Cross multiply
    925.66x = 1,388.72 × 405.78
  4. Step 4: Simplify right side
    925.66x = 563,514.80
  5. Step 5: Solve for x
    x = 563,514.80/925.66
  6. Step 6: Final answer
    x = 608.77

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.