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Finding the Fourth Proportional to 1,012.52, 1,519 and 396.28

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Solution

The fourth proportional to 1,012.52, 1,519 and 396.28 is: 594.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,012.52 : 1,519 = 396.28 : x
  2. Step 2: Convert to fraction form
    1,012.52/1,519 = 396.28/x
  3. Step 3: Cross multiply
    1,012.52x = 1,519 × 396.28
  4. Step 4: Simplify right side
    1,012.52x = 601,949.32
  5. Step 5: Solve for x
    x = 601,949.32/1,012.52
  6. Step 6: Final answer
    x = 594.51

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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.