Home / 256.60-384.90-170.20

Finding the Fourth Proportional to 256.60, 384.90 and 170.20

Calculator

Solution

The fourth proportional to 256.60, 384.90 and 170.20 is: 255.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.60 : 384.90 = 170.20 : x
  2. Step 2: Convert to fraction form
    256.60/384.90 = 170.20/x
  3. Step 3: Cross multiply
    256.60x = 384.90 × 170.20
  4. Step 4: Simplify right side
    256.60x = 65,509.98
  5. Step 5: Solve for x
    x = 65,509.98/256.60
  6. Step 6: Final answer
    x = 255.30

Related Problems

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.