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Finding the Fourth Proportional to 3,888.32, 5,364.42 and 2,491.88

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Solution

The fourth proportional to 3,888.32, 5,364.42 and 2,491.88 is: 3,437.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.32 : 5,364.42 = 2,491.88 : x
  2. Step 2: Convert to fraction form
    3,888.32/5,364.42 = 2,491.88/x
  3. Step 3: Cross multiply
    3,888.32x = 5,364.42 × 2,491.88
  4. Step 4: Simplify right side
    3,888.32x = 13,367,464.09
  5. Step 5: Solve for x
    x = 13,367,464.09/3,888.32
  6. Step 6: Final answer
    x = 3,437.86

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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.