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Finding the Fourth Proportional to 3,425.43, 5,138.18 and 2,928.62

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Solution

The fourth proportional to 3,425.43, 5,138.18 and 2,928.62 is: 4,392.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,425.43 : 5,138.18 = 2,928.62 : x
  2. Step 2: Convert to fraction form
    3,425.43/5,138.18 = 2,928.62/x
  3. Step 3: Cross multiply
    3,425.43x = 5,138.18 × 2,928.62
  4. Step 4: Simplify right side
    3,425.43x = 15,047,756.99
  5. Step 5: Solve for x
    x = 15,047,756.99/3,425.43
  6. Step 6: Final answer
    x = 4,392.96

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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.