Home / 643-887.34-367

Finding the Fourth Proportional to 643, 887.34 and 367

Calculator

Solution

The fourth proportional to 643, 887.34 and 367 is: 506.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    643 : 887.34 = 367 : x
  2. Step 2: Convert to fraction form
    643/887.34 = 367/x
  3. Step 3: Cross multiply
    643x = 887.34 × 367
  4. Step 4: Simplify right side
    643x = 325,653.78
  5. Step 5: Solve for x
    x = 325,653.78/643
  6. Step 6: Final answer
    x = 506.46

Related Problems

Find fourth proportional to 321.50, 443.67 and 183.50
Half scale
Find fourth proportional to 1,286, 1,774.68 and 734
Double scale
Find fourth proportional to 644, 888.72 and 368
Similar ratio
Find fourth proportional to 964.50, 1,331.01 and 550.50
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.