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Finding the Fourth Proportional to 2,104.08, 3,156.48 and 871.44

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Solution

The fourth proportional to 2,104.08, 3,156.48 and 871.44 is: 1,307.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,104.08 : 3,156.48 = 871.44 : x
  2. Step 2: Convert to fraction form
    2,104.08/3,156.48 = 871.44/x
  3. Step 3: Cross multiply
    2,104.08x = 3,156.48 × 871.44
  4. Step 4: Simplify right side
    2,104.08x = 2,750,682.93
  5. Step 5: Solve for x
    x = 2,750,682.93/2,104.08
  6. Step 6: Final answer
    x = 1,307.31

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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.