Home / 388.19-535.36-278.39

Finding the Fourth Proportional to 388.19, 535.36 and 278.39

Calculator

Solution

The fourth proportional to 388.19, 535.36 and 278.39 is: 383.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.19 : 535.36 = 278.39 : x
  2. Step 2: Convert to fraction form
    388.19/535.36 = 278.39/x
  3. Step 3: Cross multiply
    388.19x = 535.36 × 278.39
  4. Step 4: Simplify right side
    388.19x = 149,037.02
  5. Step 5: Solve for x
    x = 149,037.02/388.19
  6. Step 6: Final answer
    x = 383.93

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.