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Finding the Fourth Proportional to 2,790.56, 4,186.24 and 843.36

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Solution

The fourth proportional to 2,790.56, 4,186.24 and 843.36 is: 1,265.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.56 : 4,186.24 = 843.36 : x
  2. Step 2: Convert to fraction form
    2,790.56/4,186.24 = 843.36/x
  3. Step 3: Cross multiply
    2,790.56x = 4,186.24 × 843.36
  4. Step 4: Simplify right side
    2,790.56x = 3,530,507.37
  5. Step 5: Solve for x
    x = 3,530,507.37/2,790.56
  6. Step 6: Final answer
    x = 1,265.16

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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.