Home / 367.85-506.71-280.37

Finding the Fourth Proportional to 367.85, 506.71 and 280.37

Calculator

Solution

The fourth proportional to 367.85, 506.71 and 280.37 is: 386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.85 : 506.71 = 280.37 : x
  2. Step 2: Convert to fraction form
    367.85/506.71 = 280.37/x
  3. Step 3: Cross multiply
    367.85x = 506.71 × 280.37
  4. Step 4: Simplify right side
    367.85x = 142,066.28
  5. Step 5: Solve for x
    x = 142,066.28/367.85
  6. Step 6: Final answer
    x = 386.21

Related Problems

Find fourth proportional to 183.93, 253.36 and 140.19
Half scale
Find fourth proportional to 735.70, 1,013.42 and 560.74
Double scale
Find fourth proportional to 368.85, 508.09 and 281.37
Similar ratio
Find fourth proportional to 551.78, 760.07 and 420.56
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.