Home / 461.61-688.86-380.61

Finding the Fourth Proportional to 461.61, 688.86 and 380.61

Calculator

Solution

The fourth proportional to 461.61, 688.86 and 380.61 is: 567.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.61 : 688.86 = 380.61 : x
  2. Step 2: Convert to fraction form
    461.61/688.86 = 380.61/x
  3. Step 3: Cross multiply
    461.61x = 688.86 × 380.61
  4. Step 4: Simplify right side
    461.61x = 262,187.00
  5. Step 5: Solve for x
    x = 262,187.00/461.61
  6. Step 6: Final answer
    x = 567.98

Related Problems

Find fourth proportional to 230.81, 344.43 and 190.31
Half scale
Find fourth proportional to 923.22, 1,377.72 and 761.22
Double scale
Find fourth proportional to 462.61, 690.35 and 381.61
Similar ratio
Find fourth proportional to 692.42, 1,033.29 and 570.92
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.