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Finding the Fourth Proportional to 1,339.02, 2,007 and 516.87

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Solution

The fourth proportional to 1,339.02, 2,007 and 516.87 is: 774.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.02 : 2,007 = 516.87 : x
  2. Step 2: Convert to fraction form
    1,339.02/2,007 = 516.87/x
  3. Step 3: Cross multiply
    1,339.02x = 2,007 × 516.87
  4. Step 4: Simplify right side
    1,339.02x = 1,037,358.09
  5. Step 5: Solve for x
    x = 1,037,358.09/1,339.02
  6. Step 6: Final answer
    x = 774.71

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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.