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Finding the Fourth Proportional to 591.94, 817.17 and 405.50

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Solution

The fourth proportional to 591.94, 817.17 and 405.50 is: 559.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    591.94 : 817.17 = 405.50 : x
  2. Step 2: Convert to fraction form
    591.94/817.17 = 405.50/x
  3. Step 3: Cross multiply
    591.94x = 817.17 × 405.50
  4. Step 4: Simplify right side
    591.94x = 331,362.44
  5. Step 5: Solve for x
    x = 331,362.44/591.94
  6. Step 6: Final answer
    x = 559.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.