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Finding the Fourth Proportional to 2,611.54, 3,917.31 and 881.38

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Solution

The fourth proportional to 2,611.54, 3,917.31 and 881.38 is: 1,322.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.54 : 3,917.31 = 881.38 : x
  2. Step 2: Convert to fraction form
    2,611.54/3,917.31 = 881.38/x
  3. Step 3: Cross multiply
    2,611.54x = 3,917.31 × 881.38
  4. Step 4: Simplify right side
    2,611.54x = 3,452,638.69
  5. Step 5: Solve for x
    x = 3,452,638.69/2,611.54
  6. Step 6: Final answer
    x = 1,322.07

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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.