Home / 805-1,207.50-227.89

Finding the Fourth Proportional to 805, 1,207.50 and 227.89

Calculator

Solution

The fourth proportional to 805, 1,207.50 and 227.89 is: 341.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    805 : 1,207.50 = 227.89 : x
  2. Step 2: Convert to fraction form
    805/1,207.50 = 227.89/x
  3. Step 3: Cross multiply
    805x = 1,207.50 × 227.89
  4. Step 4: Simplify right side
    805x = 275,177.18
  5. Step 5: Solve for x
    x = 275,177.18/805
  6. Step 6: Final answer
    x = 341.84

Related Problems

Find fourth proportional to 402.50, 603.75 and 113.95
Half scale
Find fourth proportional to 1,610, 2,415 and 455.78
Double scale
Find fourth proportional to 806, 1,209 and 228.89
Similar ratio
Find fourth proportional to 1,207.50, 1,811.25 and 341.84
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.