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Finding the Fourth Proportional to 3,467.88, 5,201.68 and 1,128

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Solution

The fourth proportional to 3,467.88, 5,201.68 and 1,128 is: 1,691.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,467.88 : 5,201.68 = 1,128 : x
  2. Step 2: Convert to fraction form
    3,467.88/5,201.68 = 1,128/x
  3. Step 3: Cross multiply
    3,467.88x = 5,201.68 × 1,128
  4. Step 4: Simplify right side
    3,467.88x = 5,867,495.04
  5. Step 5: Solve for x
    x = 5,867,495.04/3,467.88
  6. Step 6: Final answer
    x = 1,691.95

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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.