Home / 343-514.50-115

Finding the Fourth Proportional to 343, 514.50 and 115

Calculator

Solution

The fourth proportional to 343, 514.50 and 115 is: 172.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    343 : 514.50 = 115 : x
  2. Step 2: Convert to fraction form
    343/514.50 = 115/x
  3. Step 3: Cross multiply
    343x = 514.50 × 115
  4. Step 4: Simplify right side
    343x = 59,167.50
  5. Step 5: Solve for x
    x = 59,167.50/343
  6. Step 6: Final answer
    x = 172.50

Related Problems

Find fourth proportional to 171.50, 257.25 and 57.50
Half scale
Find fourth proportional to 686, 1,029 and 230
Double scale
Find fourth proportional to 344, 516 and 116
Similar ratio
Find fourth proportional to 514.50, 771.75 and 172.50
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.