Home / 1,186.24-1,780-492.80

Finding the Fourth Proportional to 1,186.24, 1,780 and 492.80

Calculator

Solution

The fourth proportional to 1,186.24, 1,780 and 492.80 is: 739.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.24 : 1,780 = 492.80 : x
  2. Step 2: Convert to fraction form
    1,186.24/1,780 = 492.80/x
  3. Step 3: Cross multiply
    1,186.24x = 1,780 × 492.80
  4. Step 4: Simplify right side
    1,186.24x = 877,184
  5. Step 5: Solve for x
    x = 877,184/1,186.24
  6. Step 6: Final answer
    x = 739.47

Related Problems

Find fourth proportional to 593.12, 890 and 246.40
Half scale
Find fourth proportional to 2,372.48, 3,560 and 985.60
Double scale
Find fourth proportional to 1,187.24, 1,781.50 and 493.80
Similar ratio
Find fourth proportional to 1,779.36, 2,670 and 739.20
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.