Home / 605.91-909-484.41

Finding the Fourth Proportional to 605.91, 909 and 484.41

Calculator

Solution

The fourth proportional to 605.91, 909 and 484.41 is: 726.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.91 : 909 = 484.41 : x
  2. Step 2: Convert to fraction form
    605.91/909 = 484.41/x
  3. Step 3: Cross multiply
    605.91x = 909 × 484.41
  4. Step 4: Simplify right side
    605.91x = 440,328.69
  5. Step 5: Solve for x
    x = 440,328.69/605.91
  6. Step 6: Final answer
    x = 726.72

Related Problems

Find fourth proportional to 302.96, 454.50 and 242.21
Half scale
Find fourth proportional to 1,211.82, 1,818 and 968.82
Double scale
Find fourth proportional to 606.91, 910.50 and 485.41
Similar ratio
Find fourth proportional to 908.87, 1,363.50 and 726.62
1.5x scale

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.