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Finding the Fourth Proportional to 627.80, 941.86 and 339

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Solution

The fourth proportional to 627.80, 941.86 and 339 is: 508.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.80 : 941.86 = 339 : x
  2. Step 2: Convert to fraction form
    627.80/941.86 = 339/x
  3. Step 3: Cross multiply
    627.80x = 941.86 × 339
  4. Step 4: Simplify right side
    627.80x = 319,290.54
  5. Step 5: Solve for x
    x = 319,290.54/627.80
  6. Step 6: Final answer
    x = 508.59

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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.