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Finding the Fourth Proportional to 732.78, 1,097.18 and 385.39

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Solution

The fourth proportional to 732.78, 1,097.18 and 385.39 is: 577.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    732.78 : 1,097.18 = 385.39 : x
  2. Step 2: Convert to fraction form
    732.78/1,097.18 = 385.39/x
  3. Step 3: Cross multiply
    732.78x = 1,097.18 × 385.39
  4. Step 4: Simplify right side
    732.78x = 422,843.09
  5. Step 5: Solve for x
    x = 422,843.09/732.78
  6. Step 6: Final answer
    x = 577.04

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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.