Home / 2,178.18-3,266.42-791.28

Finding the Fourth Proportional to 2,178.18, 3,266.42 and 791.28

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Solution

The fourth proportional to 2,178.18, 3,266.42 and 791.28 is: 1,186.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.18 : 3,266.42 = 791.28 : x
  2. Step 2: Convert to fraction form
    2,178.18/3,266.42 = 791.28/x
  3. Step 3: Cross multiply
    2,178.18x = 3,266.42 × 791.28
  4. Step 4: Simplify right side
    2,178.18x = 2,584,648.86
  5. Step 5: Solve for x
    x = 2,584,648.86/2,178.18
  6. Step 6: Final answer
    x = 1,186.61

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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.