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Finding the Fourth Proportional to 896.78, 1,344.92 and 272.15

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Solution

The fourth proportional to 896.78, 1,344.92 and 272.15 is: 408.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.78 : 1,344.92 = 272.15 : x
  2. Step 2: Convert to fraction form
    896.78/1,344.92 = 272.15/x
  3. Step 3: Cross multiply
    896.78x = 1,344.92 × 272.15
  4. Step 4: Simplify right side
    896.78x = 366,013.93
  5. Step 5: Solve for x
    x = 366,013.93/896.78
  6. Step 6: Final answer
    x = 408.14

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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.