Home / 295.47-409.95-280.44

Finding the Fourth Proportional to 295.47, 409.95 and 280.44

Calculator

Solution

The fourth proportional to 295.47, 409.95 and 280.44 is: 389.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.47 : 409.95 = 280.44 : x
  2. Step 2: Convert to fraction form
    295.47/409.95 = 280.44/x
  3. Step 3: Cross multiply
    295.47x = 409.95 × 280.44
  4. Step 4: Simplify right side
    295.47x = 114,964.83
  5. Step 5: Solve for x
    x = 114,964.83/295.47
  6. Step 6: Final answer
    x = 389.09

Related Problems

Find fourth proportional to 147.74, 204.97 and 140.22
Half scale
Find fourth proportional to 590.95, 819.90 and 560.87
Double scale
Find fourth proportional to 296.47, 411.34 and 281.44
Similar ratio
Find fourth proportional to 443.21, 614.92 and 420.66
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.