Home / 483-724.78-255

Finding the Fourth Proportional to 483, 724.78 and 255

Calculator

Solution

The fourth proportional to 483, 724.78 and 255 is: 382.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    483 : 724.78 = 255 : x
  2. Step 2: Convert to fraction form
    483/724.78 = 255/x
  3. Step 3: Cross multiply
    483x = 724.78 × 255
  4. Step 4: Simplify right side
    483x = 184,818.90
  5. Step 5: Solve for x
    x = 184,818.90/483
  6. Step 6: Final answer
    x = 382.65

Related Problems

Find fourth proportional to 241.50, 362.39 and 127.50
Half scale
Find fourth proportional to 966, 1,449.56 and 510
Double scale
Find fourth proportional to 484, 726.28 and 256
Similar ratio
Find fourth proportional to 724.50, 1,087.17 and 382.50
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.