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Finding the Fourth Proportional to 3,326, 4,987.72 and 1,376.88

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Solution

The fourth proportional to 3,326, 4,987.72 and 1,376.88 is: 2,064.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326 : 4,987.72 = 1,376.88 : x
  2. Step 2: Convert to fraction form
    3,326/4,987.72 = 1,376.88/x
  3. Step 3: Cross multiply
    3,326x = 4,987.72 × 1,376.88
  4. Step 4: Simplify right side
    3,326x = 6,867,491.91
  5. Step 5: Solve for x
    x = 6,867,491.91/3,326
  6. Step 6: Final answer
    x = 2,064.79

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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.