Home / 388.72-586-325

Finding the Fourth Proportional to 388.72, 586 and 325

Calculator

Solution

The fourth proportional to 388.72, 586 and 325 is: 489.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.72 : 586 = 325 : x
  2. Step 2: Convert to fraction form
    388.72/586 = 325/x
  3. Step 3: Cross multiply
    388.72x = 586 × 325
  4. Step 4: Simplify right side
    388.72x = 190,450
  5. Step 5: Solve for x
    x = 190,450/388.72
  6. Step 6: Final answer
    x = 489.94

Related Problems

Find fourth proportional to 194.36, 293 and 162.50
Half scale
Find fourth proportional to 777.44, 1,172 and 650
Double scale
Find fourth proportional to 389.72, 587.51 and 326
Similar ratio
Find fourth proportional to 583.08, 879 and 487.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.