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Finding the Fourth Proportional to 3,712.82, 5,569.76 and 1,115.96

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Solution

The fourth proportional to 3,712.82, 5,569.76 and 1,115.96 is: 1,674.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,712.82 : 5,569.76 = 1,115.96 : x
  2. Step 2: Convert to fraction form
    3,712.82/5,569.76 = 1,115.96/x
  3. Step 3: Cross multiply
    3,712.82x = 5,569.76 × 1,115.96
  4. Step 4: Simplify right side
    3,712.82x = 6,215,629.37
  5. Step 5: Solve for x
    x = 6,215,629.37/3,712.82
  6. Step 6: Final answer
    x = 1,674.10

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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.