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Finding the Fourth Proportional to 3,392.96, 4,679.78 and 2,133

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Solution

The fourth proportional to 3,392.96, 4,679.78 and 2,133 is: 2,941.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.96 : 4,679.78 = 2,133 : x
  2. Step 2: Convert to fraction form
    3,392.96/4,679.78 = 2,133/x
  3. Step 3: Cross multiply
    3,392.96x = 4,679.78 × 2,133
  4. Step 4: Simplify right side
    3,392.96x = 9,981,960.08
  5. Step 5: Solve for x
    x = 9,981,960.08/3,392.96
  6. Step 6: Final answer
    x = 2,941.97

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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.