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Finding the Fourth Proportional to 1,382.08, 2,072.76 and 516.28

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Solution

The fourth proportional to 1,382.08, 2,072.76 and 516.28 is: 774.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.08 : 2,072.76 = 516.28 : x
  2. Step 2: Convert to fraction form
    1,382.08/2,072.76 = 516.28/x
  3. Step 3: Cross multiply
    1,382.08x = 2,072.76 × 516.28
  4. Step 4: Simplify right side
    1,382.08x = 1,070,124.53
  5. Step 5: Solve for x
    x = 1,070,124.53/1,382.08
  6. Step 6: Final answer
    x = 774.29

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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.