Home / 613-919.50-157

Finding the Fourth Proportional to 613, 919.50 and 157

Calculator

Solution

The fourth proportional to 613, 919.50 and 157 is: 235.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    613 : 919.50 = 157 : x
  2. Step 2: Convert to fraction form
    613/919.50 = 157/x
  3. Step 3: Cross multiply
    613x = 919.50 × 157
  4. Step 4: Simplify right side
    613x = 144,361.50
  5. Step 5: Solve for x
    x = 144,361.50/613
  6. Step 6: Final answer
    x = 235.50

Related Problems

Find fourth proportional to 306.50, 459.75 and 78.50
Half scale
Find fourth proportional to 1,226, 1,839 and 314
Double scale
Find fourth proportional to 614, 921 and 158
Similar ratio
Find fourth proportional to 919.50, 1,379.25 and 235.50
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.