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Finding the Fourth Proportional to 1,995, 2,753.28 and 1,167

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Solution

The fourth proportional to 1,995, 2,753.28 and 1,167 is: 1,610.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995 : 2,753.28 = 1,167 : x
  2. Step 2: Convert to fraction form
    1,995/2,753.28 = 1,167/x
  3. Step 3: Cross multiply
    1,995x = 2,753.28 × 1,167
  4. Step 4: Simplify right side
    1,995x = 3,213,077.76
  5. Step 5: Solve for x
    x = 3,213,077.76/1,995
  6. Step 6: Final answer
    x = 1,610.57

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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.