Home / 2,808.15-4,212.21-756.15

Finding the Fourth Proportional to 2,808.15, 4,212.21 and 756.15

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Solution

The fourth proportional to 2,808.15, 4,212.21 and 756.15 is: 1,134.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.15 : 4,212.21 = 756.15 : x
  2. Step 2: Convert to fraction form
    2,808.15/4,212.21 = 756.15/x
  3. Step 3: Cross multiply
    2,808.15x = 4,212.21 × 756.15
  4. Step 4: Simplify right side
    2,808.15x = 3,185,049.63
  5. Step 5: Solve for x
    x = 3,185,049.63/2,808.15
  6. Step 6: Final answer
    x = 1,134.22

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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.