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Finding the Fourth Proportional to 546.21, 818.31 and 285.94

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Solution

The fourth proportional to 546.21, 818.31 and 285.94 is: 428.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    546.21 : 818.31 = 285.94 : x
  2. Step 2: Convert to fraction form
    546.21/818.31 = 285.94/x
  3. Step 3: Cross multiply
    546.21x = 818.31 × 285.94
  4. Step 4: Simplify right side
    546.21x = 233,989.66
  5. Step 5: Solve for x
    x = 233,989.66/546.21
  6. Step 6: Final answer
    x = 428.39

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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.