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Finding the Fourth Proportional to 2,591.72, 3,889.19 and 1,052.72

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Solution

The fourth proportional to 2,591.72, 3,889.19 and 1,052.72 is: 1,579.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,591.72 : 3,889.19 = 1,052.72 : x
  2. Step 2: Convert to fraction form
    2,591.72/3,889.19 = 1,052.72/x
  3. Step 3: Cross multiply
    2,591.72x = 3,889.19 × 1,052.72
  4. Step 4: Simplify right side
    2,591.72x = 4,094,203.39
  5. Step 5: Solve for x
    x = 4,094,203.39/2,591.72
  6. Step 6: Final answer
    x = 1,579.73

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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.