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Finding the Fourth Proportional to 5,458.78, 8,188.26 and 1,996

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Solution

The fourth proportional to 5,458.78, 8,188.26 and 1,996 is: 2,994.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,458.78 : 8,188.26 = 1,996 : x
  2. Step 2: Convert to fraction form
    5,458.78/8,188.26 = 1,996/x
  3. Step 3: Cross multiply
    5,458.78x = 8,188.26 × 1,996
  4. Step 4: Simplify right side
    5,458.78x = 16,343,766.96
  5. Step 5: Solve for x
    x = 16,343,766.96/5,458.78
  6. Step 6: Final answer
    x = 2,994.03

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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.