Home / 449.64-620.72-302.51

Finding the Fourth Proportional to 449.64, 620.72 and 302.51

Calculator

Solution

The fourth proportional to 449.64, 620.72 and 302.51 is: 417.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    449.64 : 620.72 = 302.51 : x
  2. Step 2: Convert to fraction form
    449.64/620.72 = 302.51/x
  3. Step 3: Cross multiply
    449.64x = 620.72 × 302.51
  4. Step 4: Simplify right side
    449.64x = 187,769.39
  5. Step 5: Solve for x
    x = 187,769.39/449.64
  6. Step 6: Final answer
    x = 417.60

Related Problems

Find fourth proportional to 224.82, 310.36 and 151.25
Half scale
Find fourth proportional to 899.28, 1,241.43 and 605.01
Double scale
Find fourth proportional to 450.64, 622.10 and 303.51
Similar ratio
Find fourth proportional to 674.46, 931.07 and 453.76
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.