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Finding the Fourth Proportional to 1,995.90, 2,754.39 and 1,111.68

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Solution

The fourth proportional to 1,995.90, 2,754.39 and 1,111.68 is: 1,534.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,995.90 : 2,754.39 = 1,111.68 : x
  2. Step 2: Convert to fraction form
    1,995.90/2,754.39 = 1,111.68/x
  3. Step 3: Cross multiply
    1,995.90x = 2,754.39 × 1,111.68
  4. Step 4: Simplify right side
    1,995.90x = 3,062,000.28
  5. Step 5: Solve for x
    x = 3,062,000.28/1,995.90
  6. Step 6: Final answer
    x = 1,534.15

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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.