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Finding the Fourth Proportional to 1,383.52, 2,073.68 and 516.96

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Solution

The fourth proportional to 1,383.52, 2,073.68 and 516.96 is: 774.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.52 : 2,073.68 = 516.96 : x
  2. Step 2: Convert to fraction form
    1,383.52/2,073.68 = 516.96/x
  3. Step 3: Cross multiply
    1,383.52x = 2,073.68 × 516.96
  4. Step 4: Simplify right side
    1,383.52x = 1,072,009.61
  5. Step 5: Solve for x
    x = 1,072,009.61/1,383.52
  6. Step 6: Final answer
    x = 774.84

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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.