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Finding the Fourth Proportional to 3,876.56, 5,815.06 and 1,411.64

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Solution

The fourth proportional to 3,876.56, 5,815.06 and 1,411.64 is: 2,117.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.56 : 5,815.06 = 1,411.64 : x
  2. Step 2: Convert to fraction form
    3,876.56/5,815.06 = 1,411.64/x
  3. Step 3: Cross multiply
    3,876.56x = 5,815.06 × 1,411.64
  4. Step 4: Simplify right side
    3,876.56x = 8,208,738.69
  5. Step 5: Solve for x
    x = 8,208,738.69/3,876.56
  6. Step 6: Final answer
    x = 2,117.53

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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.