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Finding the Fourth Proportional to 549.37, 824.21 and 317.85

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Solution

The fourth proportional to 549.37, 824.21 and 317.85 is: 476.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.37 : 824.21 = 317.85 : x
  2. Step 2: Convert to fraction form
    549.37/824.21 = 317.85/x
  3. Step 3: Cross multiply
    549.37x = 824.21 × 317.85
  4. Step 4: Simplify right side
    549.37x = 261,975.15
  5. Step 5: Solve for x
    x = 261,975.15/549.37
  6. Step 6: Final answer
    x = 476.86

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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.