Home / 294.79-442.20-213.79

Finding the Fourth Proportional to 294.79, 442.20 and 213.79

Calculator

Solution

The fourth proportional to 294.79, 442.20 and 213.79 is: 320.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    294.79 : 442.20 = 213.79 : x
  2. Step 2: Convert to fraction form
    294.79/442.20 = 213.79/x
  3. Step 3: Cross multiply
    294.79x = 442.20 × 213.79
  4. Step 4: Simplify right side
    294.79x = 94,537.94
  5. Step 5: Solve for x
    x = 94,537.94/294.79
  6. Step 6: Final answer
    x = 320.70

Related Problems

Find fourth proportional to 147.40, 221.10 and 106.90
Half scale
Find fourth proportional to 589.58, 884.40 and 427.58
Double scale
Find fourth proportional to 295.79, 443.70 and 214.79
Similar ratio
Find fourth proportional to 442.19, 663.30 and 320.69
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.