Home / 545-817.20-179.76

Finding the Fourth Proportional to 545, 817.20 and 179.76

Calculator

Solution

The fourth proportional to 545, 817.20 and 179.76 is: 269.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    545 : 817.20 = 179.76 : x
  2. Step 2: Convert to fraction form
    545/817.20 = 179.76/x
  3. Step 3: Cross multiply
    545x = 817.20 × 179.76
  4. Step 4: Simplify right side
    545x = 146,899.87
  5. Step 5: Solve for x
    x = 146,899.87/545
  6. Step 6: Final answer
    x = 269.54

Related Problems

Find fourth proportional to 272.50, 408.60 and 89.88
Half scale
Find fourth proportional to 1,090, 1,634.40 and 359.52
Double scale
Find fourth proportional to 546, 818.70 and 180.76
Similar ratio
Find fourth proportional to 817.50, 1,225.80 and 269.64
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.