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Finding the Fourth Proportional to 6,289.60, 8,685.60 and 4,194.88

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Solution

The fourth proportional to 6,289.60, 8,685.60 and 4,194.88 is: 5,792.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289.60 : 8,685.60 = 4,194.88 : x
  2. Step 2: Convert to fraction form
    6,289.60/8,685.60 = 4,194.88/x
  3. Step 3: Cross multiply
    6,289.60x = 8,685.60 × 4,194.88
  4. Step 4: Simplify right side
    6,289.60x = 36,435,049.73
  5. Step 5: Solve for x
    x = 36,435,049.73/6,289.60
  6. Step 6: Final answer
    x = 5,792.90

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1.5x scale

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.