Home / 3,454.56-5,182-989.74

Finding the Fourth Proportional to 3,454.56, 5,182 and 989.74

Calculator

Solution

The fourth proportional to 3,454.56, 5,182 and 989.74 is: 1,484.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,454.56 : 5,182 = 989.74 : x
  2. Step 2: Convert to fraction form
    3,454.56/5,182 = 989.74/x
  3. Step 3: Cross multiply
    3,454.56x = 5,182 × 989.74
  4. Step 4: Simplify right side
    3,454.56x = 5,128,832.68
  5. Step 5: Solve for x
    x = 5,128,832.68/3,454.56
  6. Step 6: Final answer
    x = 1,484.66

Related Problems

Find fourth proportional to 1,727.28, 2,591 and 494.87
Half scale
Find fourth proportional to 6,909.12, 10,364 and 1,979.48
Double scale
Find fourth proportional to 3,455.56, 5,183.50 and 990.74
Similar ratio
Find fourth proportional to 5,181.84, 7,773 and 1,484.61
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.