Home / 2,178.13-3,266.34-791.12

Finding the Fourth Proportional to 2,178.13, 3,266.34 and 791.12

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Solution

The fourth proportional to 2,178.13, 3,266.34 and 791.12 is: 1,186.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.13 : 3,266.34 = 791.12 : x
  2. Step 2: Convert to fraction form
    2,178.13/3,266.34 = 791.12/x
  3. Step 3: Cross multiply
    2,178.13x = 3,266.34 × 791.12
  4. Step 4: Simplify right side
    2,178.13x = 2,584,066.90
  5. Step 5: Solve for x
    x = 2,584,066.90/2,178.13
  6. Step 6: Final answer
    x = 1,186.37

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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.