Home / 1,038.97-1,558-308.35

Finding the Fourth Proportional to 1,038.97, 1,558 and 308.35

Calculator

Solution

The fourth proportional to 1,038.97, 1,558 and 308.35 is: 462.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038.97 : 1,558 = 308.35 : x
  2. Step 2: Convert to fraction form
    1,038.97/1,558 = 308.35/x
  3. Step 3: Cross multiply
    1,038.97x = 1,558 × 308.35
  4. Step 4: Simplify right side
    1,038.97x = 480,409.30
  5. Step 5: Solve for x
    x = 480,409.30/1,038.97
  6. Step 6: Final answer
    x = 462.39

Related Problems

Find fourth proportional to 519.49, 779 and 154.18
Half scale
Find fourth proportional to 2,077.94, 3,116 and 616.70
Double scale
Find fourth proportional to 1,039.97, 1,559.50 and 309.35
Similar ratio
Find fourth proportional to 1,558.46, 2,337 and 462.53
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.