Home / 1,539-2,308.50-384.78

Finding the Fourth Proportional to 1,539, 2,308.50 and 384.78

Calculator

Solution

The fourth proportional to 1,539, 2,308.50 and 384.78 is: 577.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,539 : 2,308.50 = 384.78 : x
  2. Step 2: Convert to fraction form
    1,539/2,308.50 = 384.78/x
  3. Step 3: Cross multiply
    1,539x = 2,308.50 × 384.78
  4. Step 4: Simplify right side
    1,539x = 888,264.63
  5. Step 5: Solve for x
    x = 888,264.63/1,539
  6. Step 6: Final answer
    x = 577.17

Related Problems

Find fourth proportional to 769.50, 1,154.25 and 192.39
Half scale
Find fourth proportional to 3,078, 4,617 and 769.56
Double scale
Find fourth proportional to 1,540, 2,310 and 385.78
Similar ratio
Find fourth proportional to 2,308.50, 3,462.75 and 577.17
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.