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Finding the Fourth Proportional to 627.54, 866.04 and 378.86

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Solution

The fourth proportional to 627.54, 866.04 and 378.86 is: 522.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.54 : 866.04 = 378.86 : x
  2. Step 2: Convert to fraction form
    627.54/866.04 = 378.86/x
  3. Step 3: Cross multiply
    627.54x = 866.04 × 378.86
  4. Step 4: Simplify right side
    627.54x = 328,103.72
  5. Step 5: Solve for x
    x = 328,103.72/627.54
  6. Step 6: Final answer
    x = 522.84

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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.