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Finding the Fourth Proportional to 3,619.66, 4,992.76 and 2,872.44

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Solution

The fourth proportional to 3,619.66, 4,992.76 and 2,872.44 is: 3,962.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,619.66 : 4,992.76 = 2,872.44 : x
  2. Step 2: Convert to fraction form
    3,619.66/4,992.76 = 2,872.44/x
  3. Step 3: Cross multiply
    3,619.66x = 4,992.76 × 2,872.44
  4. Step 4: Simplify right side
    3,619.66x = 14,341,403.53
  5. Step 5: Solve for x
    x = 14,341,403.53/3,619.66
  6. Step 6: Final answer
    x = 3,962.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.