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Finding the Fourth Proportional to 2,740, 4,110.69 and 792.21

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Solution

The fourth proportional to 2,740, 4,110.69 and 792.21 is: 1,188.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740 : 4,110.69 = 792.21 : x
  2. Step 2: Convert to fraction form
    2,740/4,110.69 = 792.21/x
  3. Step 3: Cross multiply
    2,740x = 4,110.69 × 792.21
  4. Step 4: Simplify right side
    2,740x = 3,256,529.72
  5. Step 5: Solve for x
    x = 3,256,529.72/2,740
  6. Step 6: Final answer
    x = 1,188.51

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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.