Home / 533.90-800.65-187.20

Finding the Fourth Proportional to 533.90, 800.65 and 187.20

Calculator

Solution

The fourth proportional to 533.90, 800.65 and 187.20 is: 280.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    533.90 : 800.65 = 187.20 : x
  2. Step 2: Convert to fraction form
    533.90/800.65 = 187.20/x
  3. Step 3: Cross multiply
    533.90x = 800.65 × 187.20
  4. Step 4: Simplify right side
    533.90x = 149,881.21
  5. Step 5: Solve for x
    x = 149,881.21/533.90
  6. Step 6: Final answer
    x = 280.73

Related Problems

Find fourth proportional to 266.95, 400.32 and 93.60
Half scale
Find fourth proportional to 1,067.79, 1,601.30 and 374.40
Double scale
Find fourth proportional to 534.90, 802.15 and 188.20
Similar ratio
Find fourth proportional to 800.84, 1,200.97 and 280.80
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.