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Finding the Fourth Proportional to 1,216.73, 1,825.12 and 395

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Solution

The fourth proportional to 1,216.73, 1,825.12 and 395 is: 592.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216.73 : 1,825.12 = 395 : x
  2. Step 2: Convert to fraction form
    1,216.73/1,825.12 = 395/x
  3. Step 3: Cross multiply
    1,216.73x = 1,825.12 × 395
  4. Step 4: Simplify right side
    1,216.73x = 720,920.43
  5. Step 5: Solve for x
    x = 720,920.43/1,216.73
  6. Step 6: Final answer
    x = 592.51

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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.