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Finding the Fourth Proportional to 3,107.82, 4,661.69 and 767.85

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Solution

The fourth proportional to 3,107.82, 4,661.69 and 767.85 is: 1,151.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,107.82 : 4,661.69 = 767.85 : x
  2. Step 2: Convert to fraction form
    3,107.82/4,661.69 = 767.85/x
  3. Step 3: Cross multiply
    3,107.82x = 4,661.69 × 767.85
  4. Step 4: Simplify right side
    3,107.82x = 3,579,474.83
  5. Step 5: Solve for x
    x = 3,579,474.83/3,107.82
  6. Step 6: Final answer
    x = 1,151.76

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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.