Home / 424-585.12-240

Finding the Fourth Proportional to 424, 585.12 and 240

Calculator

Solution

The fourth proportional to 424, 585.12 and 240 is: 331.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    424 : 585.12 = 240 : x
  2. Step 2: Convert to fraction form
    424/585.12 = 240/x
  3. Step 3: Cross multiply
    424x = 585.12 × 240
  4. Step 4: Simplify right side
    424x = 140,428.80
  5. Step 5: Solve for x
    x = 140,428.80/424
  6. Step 6: Final answer
    x = 331.20

Related Problems

Find fourth proportional to 212, 292.56 and 120
Half scale
Find fourth proportional to 848, 1,170.24 and 480
Double scale
Find fourth proportional to 425, 586.50 and 241
Similar ratio
Find fourth proportional to 636, 877.68 and 360
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.