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Finding the Fourth Proportional to 3,928.62, 5,894.04 and 1,331.76

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Solution

The fourth proportional to 3,928.62, 5,894.04 and 1,331.76 is: 1,998.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.62 : 5,894.04 = 1,331.76 : x
  2. Step 2: Convert to fraction form
    3,928.62/5,894.04 = 1,331.76/x
  3. Step 3: Cross multiply
    3,928.62x = 5,894.04 × 1,331.76
  4. Step 4: Simplify right side
    3,928.62x = 7,849,446.71
  5. Step 5: Solve for x
    x = 7,849,446.71/3,928.62
  6. Step 6: Final answer
    x = 1,998.02

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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.