Home / 341.96-515.14-257

Finding the Fourth Proportional to 341.96, 515.14 and 257

Calculator

Solution

The fourth proportional to 341.96, 515.14 and 257 is: 387.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.96 : 515.14 = 257 : x
  2. Step 2: Convert to fraction form
    341.96/515.14 = 257/x
  3. Step 3: Cross multiply
    341.96x = 515.14 × 257
  4. Step 4: Simplify right side
    341.96x = 132,390.98
  5. Step 5: Solve for x
    x = 132,390.98/341.96
  6. Step 6: Final answer
    x = 387.15

Related Problems

Find fourth proportional to 170.98, 257.57 and 128.50
Half scale
Find fourth proportional to 683.92, 1,030.28 and 514
Double scale
Find fourth proportional to 342.96, 516.65 and 258
Similar ratio
Find fourth proportional to 512.94, 772.71 and 385.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.