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Finding the Fourth Proportional to 4,650.68, 6,978.50 and 2,185.54

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Solution

The fourth proportional to 4,650.68, 6,978.50 and 2,185.54 is: 3,279.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,650.68 : 6,978.50 = 2,185.54 : x
  2. Step 2: Convert to fraction form
    4,650.68/6,978.50 = 2,185.54/x
  3. Step 3: Cross multiply
    4,650.68x = 6,978.50 × 2,185.54
  4. Step 4: Simplify right side
    4,650.68x = 15,251,790.89
  5. Step 5: Solve for x
    x = 15,251,790.89/4,650.68
  6. Step 6: Final answer
    x = 3,279.48

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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.