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Finding the Fourth Proportional to 3,888, 5,365.44 and 2,491.56

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Solution

The fourth proportional to 3,888, 5,365.44 and 2,491.56 is: 3,438.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888 : 5,365.44 = 2,491.56 : x
  2. Step 2: Convert to fraction form
    3,888/5,365.44 = 2,491.56/x
  3. Step 3: Cross multiply
    3,888x = 5,365.44 × 2,491.56
  4. Step 4: Simplify right side
    3,888x = 13,368,315.69
  5. Step 5: Solve for x
    x = 13,368,315.69/3,888
  6. Step 6: Final answer
    x = 3,438.35

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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.