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Finding the Fourth Proportional to 3,129, 4,691.34 and 1,896.72

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Solution

The fourth proportional to 3,129, 4,691.34 and 1,896.72 is: 2,843.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129 : 4,691.34 = 1,896.72 : x
  2. Step 2: Convert to fraction form
    3,129/4,691.34 = 1,896.72/x
  3. Step 3: Cross multiply
    3,129x = 4,691.34 × 1,896.72
  4. Step 4: Simplify right side
    3,129x = 8,898,158.40
  5. Step 5: Solve for x
    x = 8,898,158.40/3,129
  6. Step 6: Final answer
    x = 2,843.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.