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Finding the Fourth Proportional to 627.07, 940.64 and 261.89

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Solution

The fourth proportional to 627.07, 940.64 and 261.89 is: 392.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.07 : 940.64 = 261.89 : x
  2. Step 2: Convert to fraction form
    627.07/940.64 = 261.89/x
  3. Step 3: Cross multiply
    627.07x = 940.64 × 261.89
  4. Step 4: Simplify right side
    627.07x = 246,344.21
  5. Step 5: Solve for x
    x = 246,344.21/627.07
  6. Step 6: Final answer
    x = 392.85

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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.