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Finding the Fourth Proportional to 550.21, 758.80 and 353.65

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Solution

The fourth proportional to 550.21, 758.80 and 353.65 is: 487.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.21 : 758.80 = 353.65 : x
  2. Step 2: Convert to fraction form
    550.21/758.80 = 353.65/x
  3. Step 3: Cross multiply
    550.21x = 758.80 × 353.65
  4. Step 4: Simplify right side
    550.21x = 268,349.62
  5. Step 5: Solve for x
    x = 268,349.62/550.21
  6. Step 6: Final answer
    x = 487.72

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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.