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Finding the Fourth Proportional to 6,128.90, 8,458.50 and 3,611.79

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Solution

The fourth proportional to 6,128.90, 8,458.50 and 3,611.79 is: 4,984.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,128.90 : 8,458.50 = 3,611.79 : x
  2. Step 2: Convert to fraction form
    6,128.90/8,458.50 = 3,611.79/x
  3. Step 3: Cross multiply
    6,128.90x = 8,458.50 × 3,611.79
  4. Step 4: Simplify right side
    6,128.90x = 30,550,325.72
  5. Step 5: Solve for x
    x = 30,550,325.72/6,128.90
  6. Step 6: Final answer
    x = 4,984.64

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.