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Finding the Fourth Proportional to 1,691.82, 2,333.97 and 992.88

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Solution

The fourth proportional to 1,691.82, 2,333.97 and 992.88 is: 1,369.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.82 : 2,333.97 = 992.88 : x
  2. Step 2: Convert to fraction form
    1,691.82/2,333.97 = 992.88/x
  3. Step 3: Cross multiply
    1,691.82x = 2,333.97 × 992.88
  4. Step 4: Simplify right side
    1,691.82x = 2,317,352.13
  5. Step 5: Solve for x
    x = 2,317,352.13/1,691.82
  6. Step 6: Final answer
    x = 1,369.74

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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.