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Finding the Fourth Proportional to 549.20, 758.41 and 353.05

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Solution

The fourth proportional to 549.20, 758.41 and 353.05 is: 487.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.20 : 758.41 = 353.05 : x
  2. Step 2: Convert to fraction form
    549.20/758.41 = 353.05/x
  3. Step 3: Cross multiply
    549.20x = 758.41 × 353.05
  4. Step 4: Simplify right side
    549.20x = 267,758.14
  5. Step 5: Solve for x
    x = 267,758.14/549.20
  6. Step 6: Final answer
    x = 487.54

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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.