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Finding the Fourth Proportional to 1,786.41, 2,672.61 and 1,578.64

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Solution

The fourth proportional to 1,786.41, 2,672.61 and 1,578.64 is: 2,361.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.41 : 2,672.61 = 1,578.64 : x
  2. Step 2: Convert to fraction form
    1,786.41/2,672.61 = 1,578.64/x
  3. Step 3: Cross multiply
    1,786.41x = 2,672.61 × 1,578.64
  4. Step 4: Simplify right side
    1,786.41x = 4,219,089.05
  5. Step 5: Solve for x
    x = 4,219,089.05/1,786.41
  6. Step 6: Final answer
    x = 2,361.77

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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.