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Finding the Fourth Proportional to 559.21, 771.79 and 349.60

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Solution

The fourth proportional to 559.21, 771.79 and 349.60 is: 482.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.21 : 771.79 = 349.60 : x
  2. Step 2: Convert to fraction form
    559.21/771.79 = 349.60/x
  3. Step 3: Cross multiply
    559.21x = 771.79 × 349.60
  4. Step 4: Simplify right side
    559.21x = 269,817.78
  5. Step 5: Solve for x
    x = 269,817.78/559.21
  6. Step 6: Final answer
    x = 482.50

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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.