Home / 234-351-89.78

Finding the Fourth Proportional to 234, 351 and 89.78

Calculator

Solution

The fourth proportional to 234, 351 and 89.78 is: 134.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    234 : 351 = 89.78 : x
  2. Step 2: Convert to fraction form
    234/351 = 89.78/x
  3. Step 3: Cross multiply
    234x = 351 × 89.78
  4. Step 4: Simplify right side
    234x = 31,511.03
  5. Step 5: Solve for x
    x = 31,511.03/234
  6. Step 6: Final answer
    x = 134.66

Related Problems

Find fourth proportional to 117, 175.50 and 44.89
Half scale
Find fourth proportional to 468, 702 and 179.55
Double scale
Find fourth proportional to 235, 352.50 and 90.78
Similar ratio
Find fourth proportional to 351, 526.50 and 134.66
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.