Home / 2,178.14-3,267.21-791.21

Finding the Fourth Proportional to 2,178.14, 3,267.21 and 791.21

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Solution

The fourth proportional to 2,178.14, 3,267.21 and 791.21 is: 1,186.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.14 : 3,267.21 = 791.21 : x
  2. Step 2: Convert to fraction form
    2,178.14/3,267.21 = 791.21/x
  3. Step 3: Cross multiply
    2,178.14x = 3,267.21 × 791.21
  4. Step 4: Simplify right side
    2,178.14x = 2,585,059.81
  5. Step 5: Solve for x
    x = 2,585,059.81/2,178.14
  6. Step 6: Final answer
    x = 1,186.82

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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.