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Finding the Fourth Proportional to 1,992.64, 2,750.08 and 1,153.44

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Solution

The fourth proportional to 1,992.64, 2,750.08 and 1,153.44 is: 1,591.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.64 : 2,750.08 = 1,153.44 : x
  2. Step 2: Convert to fraction form
    1,992.64/2,750.08 = 1,153.44/x
  3. Step 3: Cross multiply
    1,992.64x = 2,750.08 × 1,153.44
  4. Step 4: Simplify right side
    1,992.64x = 3,172,052.28
  5. Step 5: Solve for x
    x = 3,172,052.28/1,992.64
  6. Step 6: Final answer
    x = 1,591.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.