Home / 305.17-421.33-235.10

Finding the Fourth Proportional to 305.17, 421.33 and 235.10

Calculator

Solution

The fourth proportional to 305.17, 421.33 and 235.10 is: 324.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.17 : 421.33 = 235.10 : x
  2. Step 2: Convert to fraction form
    305.17/421.33 = 235.10/x
  3. Step 3: Cross multiply
    305.17x = 421.33 × 235.10
  4. Step 4: Simplify right side
    305.17x = 99,056.42
  5. Step 5: Solve for x
    x = 99,056.42/305.17
  6. Step 6: Final answer
    x = 324.59

Related Problems

Find fourth proportional to 152.59, 210.67 and 117.55
Half scale
Find fourth proportional to 610.35, 842.67 and 470.21
Double scale
Find fourth proportional to 306.17, 422.71 and 236.10
Similar ratio
Find fourth proportional to 457.76, 632.00 and 352.65
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.