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Finding the Fourth Proportional to 1,012.72, 1,519.14 and 272.44

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Solution

The fourth proportional to 1,012.72, 1,519.14 and 272.44 is: 408.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.72 : 1,519.14 = 272.44 : x
  2. Step 2: Convert to fraction form
    1,012.72/1,519.14 = 272.44/x
  3. Step 3: Cross multiply
    1,012.72x = 1,519.14 × 272.44
  4. Step 4: Simplify right side
    1,012.72x = 413,874.50
  5. Step 5: Solve for x
    x = 413,874.50/1,012.72
  6. Step 6: Final answer
    x = 408.68

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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.