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Finding the Fourth Proportional to 1,338.08, 2,005.96 and 516.16

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Solution

The fourth proportional to 1,338.08, 2,005.96 and 516.16 is: 773.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.08 : 2,005.96 = 516.16 : x
  2. Step 2: Convert to fraction form
    1,338.08/2,005.96 = 516.16/x
  3. Step 3: Cross multiply
    1,338.08x = 2,005.96 × 516.16
  4. Step 4: Simplify right side
    1,338.08x = 1,035,396.31
  5. Step 5: Solve for x
    x = 1,035,396.31/1,338.08
  6. Step 6: Final answer
    x = 773.79

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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.