Home / 368.11-551.55-259.71

Finding the Fourth Proportional to 368.11, 551.55 and 259.71

Calculator

Solution

The fourth proportional to 368.11, 551.55 and 259.71 is: 389.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.11 : 551.55 = 259.71 : x
  2. Step 2: Convert to fraction form
    368.11/551.55 = 259.71/x
  3. Step 3: Cross multiply
    368.11x = 551.55 × 259.71
  4. Step 4: Simplify right side
    368.11x = 143,243.05
  5. Step 5: Solve for x
    x = 143,243.05/368.11
  6. Step 6: Final answer
    x = 389.13

Related Problems

Find fourth proportional to 184.06, 275.78 and 129.86
Half scale
Find fourth proportional to 736.22, 1,103.10 and 519.42
Double scale
Find fourth proportional to 369.11, 553.05 and 260.71
Similar ratio
Find fourth proportional to 552.17, 827.33 and 389.57
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.