Home / 927-1,390-439.48

Finding the Fourth Proportional to 927, 1,390 and 439.48

Calculator

Solution

The fourth proportional to 927, 1,390 and 439.48 is: 658.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    927 : 1,390 = 439.48 : x
  2. Step 2: Convert to fraction form
    927/1,390 = 439.48/x
  3. Step 3: Cross multiply
    927x = 1,390 × 439.48
  4. Step 4: Simplify right side
    927x = 610,877.20
  5. Step 5: Solve for x
    x = 610,877.20/927
  6. Step 6: Final answer
    x = 658.98

Related Problems

Find fourth proportional to 463.50, 695 and 219.74
Half scale
Find fourth proportional to 1,854, 2,780 and 878.96
Double scale
Find fourth proportional to 928, 1,391.50 and 440.48
Similar ratio
Find fourth proportional to 1,390.50, 2,085 and 659.22
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.