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Finding the Fourth Proportional to 2,388.75, 3,578.94 and 1,658.79

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Solution

The fourth proportional to 2,388.75, 3,578.94 and 1,658.79 is: 2,485.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,388.75 : 3,578.94 = 1,658.79 : x
  2. Step 2: Convert to fraction form
    2,388.75/3,578.94 = 1,658.79/x
  3. Step 3: Cross multiply
    2,388.75x = 3,578.94 × 1,658.79
  4. Step 4: Simplify right side
    2,388.75x = 5,936,709.88
  5. Step 5: Solve for x
    x = 5,936,709.88/2,388.75
  6. Step 6: Final answer
    x = 2,485.28

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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.