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Finding the Fourth Proportional to 2,611.44, 3,916.80 and 879.84

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Solution

The fourth proportional to 2,611.44, 3,916.80 and 879.84 is: 1,319.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.44 : 3,916.80 = 879.84 : x
  2. Step 2: Convert to fraction form
    2,611.44/3,916.80 = 879.84/x
  3. Step 3: Cross multiply
    2,611.44x = 3,916.80 × 879.84
  4. Step 4: Simplify right side
    2,611.44x = 3,446,157.31
  5. Step 5: Solve for x
    x = 3,446,157.31/2,611.44
  6. Step 6: Final answer
    x = 1,319.64

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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.