Home / 335.21-499.91-286.76

Finding the Fourth Proportional to 335.21, 499.91 and 286.76

Calculator

Solution

The fourth proportional to 335.21, 499.91 and 286.76 is: 427.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    335.21 : 499.91 = 286.76 : x
  2. Step 2: Convert to fraction form
    335.21/499.91 = 286.76/x
  3. Step 3: Cross multiply
    335.21x = 499.91 × 286.76
  4. Step 4: Simplify right side
    335.21x = 143,350.26
  5. Step 5: Solve for x
    x = 143,350.26/335.21
  6. Step 6: Final answer
    x = 427.65

Related Problems

Find fourth proportional to 167.60, 249.95 and 143.38
Half scale
Find fourth proportional to 670.41, 999.81 and 573.51
Double scale
Find fourth proportional to 336.21, 501.40 and 287.76
Similar ratio
Find fourth proportional to 502.81, 749.86 and 430.13
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.