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Finding the Fourth Proportional to 3,375.75, 4,658.54 and 1,978.50

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Solution

The fourth proportional to 3,375.75, 4,658.54 and 1,978.50 is: 2,730.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,375.75 : 4,658.54 = 1,978.50 : x
  2. Step 2: Convert to fraction form
    3,375.75/4,658.54 = 1,978.50/x
  3. Step 3: Cross multiply
    3,375.75x = 4,658.54 × 1,978.50
  4. Step 4: Simplify right side
    3,375.75x = 9,216,911.50
  5. Step 5: Solve for x
    x = 9,216,911.50/3,375.75
  6. Step 6: Final answer
    x = 2,730.33

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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.