Home / 529.41-729-418.54

Finding the Fourth Proportional to 529.41, 729 and 418.54

Calculator

Solution

The fourth proportional to 529.41, 729 and 418.54 is: 576.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.41 : 729 = 418.54 : x
  2. Step 2: Convert to fraction form
    529.41/729 = 418.54/x
  3. Step 3: Cross multiply
    529.41x = 729 × 418.54
  4. Step 4: Simplify right side
    529.41x = 305,115.66
  5. Step 5: Solve for x
    x = 305,115.66/529.41
  6. Step 6: Final answer
    x = 576.33

Related Problems

Find fourth proportional to 264.71, 364.50 and 209.27
Half scale
Find fourth proportional to 1,058.82, 1,458 and 837.08
Double scale
Find fourth proportional to 530.41, 730.38 and 419.54
Similar ratio
Find fourth proportional to 794.12, 1,093.50 and 627.81
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.