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Finding the Fourth Proportional to 943.91, 1,414.42 and 395.80

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Solution

The fourth proportional to 943.91, 1,414.42 and 395.80 is: 593.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.91 : 1,414.42 = 395.80 : x
  2. Step 2: Convert to fraction form
    943.91/1,414.42 = 395.80/x
  3. Step 3: Cross multiply
    943.91x = 1,414.42 × 395.80
  4. Step 4: Simplify right side
    943.91x = 559,827.44
  5. Step 5: Solve for x
    x = 559,827.44/943.91
  6. Step 6: Final answer
    x = 593.09

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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.