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Finding the Fourth Proportional to 1,338.31, 2,007.74 and 516.97

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Solution

The fourth proportional to 1,338.31, 2,007.74 and 516.97 is: 775.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.31 : 2,007.74 = 516.97 : x
  2. Step 2: Convert to fraction form
    1,338.31/2,007.74 = 516.97/x
  3. Step 3: Cross multiply
    1,338.31x = 2,007.74 × 516.97
  4. Step 4: Simplify right side
    1,338.31x = 1,037,941.35
  5. Step 5: Solve for x
    x = 1,037,941.35/1,338.31
  6. Step 6: Final answer
    x = 775.56

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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.