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Finding the Fourth Proportional to 1,901.64, 2,853.12 and 791.65

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Solution

The fourth proportional to 1,901.64, 2,853.12 and 791.65 is: 1,187.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,901.64 : 2,853.12 = 791.65 : x
  2. Step 2: Convert to fraction form
    1,901.64/2,853.12 = 791.65/x
  3. Step 3: Cross multiply
    1,901.64x = 2,853.12 × 791.65
  4. Step 4: Simplify right side
    1,901.64x = 2,258,672.45
  5. Step 5: Solve for x
    x = 2,258,672.45/1,901.64
  6. Step 6: Final answer
    x = 1,187.75

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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.