Home / 256.56-354-153

Finding the Fourth Proportional to 256.56, 354 and 153

Calculator

Solution

The fourth proportional to 256.56, 354 and 153 is: 211.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.56 : 354 = 153 : x
  2. Step 2: Convert to fraction form
    256.56/354 = 153/x
  3. Step 3: Cross multiply
    256.56x = 354 × 153
  4. Step 4: Simplify right side
    256.56x = 54,162
  5. Step 5: Solve for x
    x = 54,162/256.56
  6. Step 6: Final answer
    x = 211.11

Related Problems

Find fourth proportional to 128.28, 177 and 76.50
Half scale
Find fourth proportional to 513.12, 708 and 306
Double scale
Find fourth proportional to 257.56, 355.38 and 154
Similar ratio
Find fourth proportional to 384.84, 531 and 229.50
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.