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Finding the Fourth Proportional to 3,591.84, 5,388 and 1,251.72

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Solution

The fourth proportional to 3,591.84, 5,388 and 1,251.72 is: 1,877.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,591.84 : 5,388 = 1,251.72 : x
  2. Step 2: Convert to fraction form
    3,591.84/5,388 = 1,251.72/x
  3. Step 3: Cross multiply
    3,591.84x = 5,388 × 1,251.72
  4. Step 4: Simplify right side
    3,591.84x = 6,744,267.36
  5. Step 5: Solve for x
    x = 6,744,267.36/3,591.84
  6. Step 6: Final answer
    x = 1,877.66

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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.