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Finding the Fourth Proportional to 627.62, 939 and 442.94

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Solution

The fourth proportional to 627.62, 939 and 442.94 is: 662.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.62 : 939 = 442.94 : x
  2. Step 2: Convert to fraction form
    627.62/939 = 442.94/x
  3. Step 3: Cross multiply
    627.62x = 939 × 442.94
  4. Step 4: Simplify right side
    627.62x = 415,920.66
  5. Step 5: Solve for x
    x = 415,920.66/627.62
  6. Step 6: Final answer
    x = 662.70

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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.