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Finding the Fourth Proportional to 1,217.53, 1,825.91 and 395.61

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Solution

The fourth proportional to 1,217.53, 1,825.91 and 395.61 is: 593.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.53 : 1,825.91 = 395.61 : x
  2. Step 2: Convert to fraction form
    1,217.53/1,825.91 = 395.61/x
  3. Step 3: Cross multiply
    1,217.53x = 1,825.91 × 395.61
  4. Step 4: Simplify right side
    1,217.53x = 722,348.26
  5. Step 5: Solve for x
    x = 722,348.26/1,217.53
  6. Step 6: Final answer
    x = 593.29

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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.