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Finding the Fourth Proportional to 1,339.11, 2,006.91 and 516.96

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Solution

The fourth proportional to 1,339.11, 2,006.91 and 516.96 is: 774.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,339.11 : 2,006.91 = 516.96 : x
  2. Step 2: Convert to fraction form
    1,339.11/2,006.91 = 516.96/x
  3. Step 3: Cross multiply
    1,339.11x = 2,006.91 × 516.96
  4. Step 4: Simplify right side
    1,339.11x = 1,037,492.19
  5. Step 5: Solve for x
    x = 1,037,492.19/1,339.11
  6. Step 6: Final answer
    x = 774.76

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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.