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Finding the Fourth Proportional to 1,999.91, 2,760.64 and 1,573.44

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Solution

The fourth proportional to 1,999.91, 2,760.64 and 1,573.44 is: 2,171.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.91 : 2,760.64 = 1,573.44 : x
  2. Step 2: Convert to fraction form
    1,999.91/2,760.64 = 1,573.44/x
  3. Step 3: Cross multiply
    1,999.91x = 2,760.64 × 1,573.44
  4. Step 4: Simplify right side
    1,999.91x = 4,343,701.40
  5. Step 5: Solve for x
    x = 4,343,701.40/1,999.91
  6. Step 6: Final answer
    x = 2,171.95

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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.