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Finding the Fourth Proportional to 3,392.65, 5,079.39 and 2,157

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Solution

The fourth proportional to 3,392.65, 5,079.39 and 2,157 is: 3,229.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.65 : 5,079.39 = 2,157 : x
  2. Step 2: Convert to fraction form
    3,392.65/5,079.39 = 2,157/x
  3. Step 3: Cross multiply
    3,392.65x = 5,079.39 × 2,157
  4. Step 4: Simplify right side
    3,392.65x = 10,956,244.23
  5. Step 5: Solve for x
    x = 10,956,244.23/3,392.65
  6. Step 6: Final answer
    x = 3,229.41

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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.