Home / 333.20-459.32-280.55

Finding the Fourth Proportional to 333.20, 459.32 and 280.55

Calculator

Solution

The fourth proportional to 333.20, 459.32 and 280.55 is: 386.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    333.20 : 459.32 = 280.55 : x
  2. Step 2: Convert to fraction form
    333.20/459.32 = 280.55/x
  3. Step 3: Cross multiply
    333.20x = 459.32 × 280.55
  4. Step 4: Simplify right side
    333.20x = 128,858.53
  5. Step 5: Solve for x
    x = 128,858.53/333.20
  6. Step 6: Final answer
    x = 386.74

Related Problems

Find fourth proportional to 166.60, 229.66 and 140.27
Half scale
Find fourth proportional to 666.39, 918.63 and 561.09
Double scale
Find fourth proportional to 334.20, 460.69 and 281.55
Similar ratio
Find fourth proportional to 499.79, 688.97 and 420.82
1.5x scale

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.