Home / 574-861.20-317.68

Finding the Fourth Proportional to 574, 861.20 and 317.68

Calculator

Solution

The fourth proportional to 574, 861.20 and 317.68 is: 476.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    574 : 861.20 = 317.68 : x
  2. Step 2: Convert to fraction form
    574/861.20 = 317.68/x
  3. Step 3: Cross multiply
    574x = 861.20 × 317.68
  4. Step 4: Simplify right side
    574x = 273,586.02
  5. Step 5: Solve for x
    x = 273,586.02/574
  6. Step 6: Final answer
    x = 476.63

Related Problems

Find fourth proportional to 287, 430.60 and 158.84
Half scale
Find fourth proportional to 1,148, 1,722.40 and 635.36
Double scale
Find fourth proportional to 575, 862.70 and 318.68
Similar ratio
Find fourth proportional to 861, 1,291.80 and 476.52
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.