Home / 382-527.10-216.20

Finding the Fourth Proportional to 382, 527.10 and 216.20

Calculator

Solution

The fourth proportional to 382, 527.10 and 216.20 is: 298.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    382 : 527.10 = 216.20 : x
  2. Step 2: Convert to fraction form
    382/527.10 = 216.20/x
  3. Step 3: Cross multiply
    382x = 527.10 × 216.20
  4. Step 4: Simplify right side
    382x = 113,959.02
  5. Step 5: Solve for x
    x = 113,959.02/382
  6. Step 6: Final answer
    x = 298.32

Related Problems

Find fourth proportional to 191, 263.55 and 108.10
Half scale
Find fourth proportional to 764, 1,054.20 and 432.40
Double scale
Find fourth proportional to 383, 528.48 and 217.20
Similar ratio
Find fourth proportional to 573, 790.65 and 324.30
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.